Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb1f53241bbbd43c…

MALICIOUS

PDF

54.0 KB Created: 2020-08-31 20:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7504a0ec9d049d0959faa92f7903abc3 SHA-1: 24efd91ea7a687ffab7ab1c9ee577931320ccaa9 SHA-256: cb1f53241bbbd43ca34c2292fb5e184a657960540da0fca4c70c5a01b12ed775
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded JavaScript and links to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains text suggesting it is a user guide, which is a common lure for phishing or malware delivery. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=alcatel+pixi+3+user+guide In PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/516793_9708086b7591433ebaf7813f3950e233.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ab63e3_a24eb26254d54934bfdbdda7c7422759.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4b874d_9d97f3d2ac0f4287b962b90825630f16.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b04b151de58545ecbe6dbab3f5d30991.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fbccce_d44e5d3c25e24ba289d74f3ce801d244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/aphis_gossypii_glover.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/2249/2319/files/hillsong_praise_and_worship_songs_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/the_negro_mother_langston_hughes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/how_to_save_in_kingdom_come_delivera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/55873085747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/sabozuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/11760285304.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE8 3724 bytes
SHA-256: ce22c8eaa1f53a77d563481fc3f0abc202627ce0e69ac912df19b60822d178aa
font_01_sfnt_off00006d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D15 1908 bytes
SHA-256: 289918ef31f5f544664a028fc757a59255b21f2dc1b34134ebebc19b6bfdc2f1
font_02_sfnt_off00007626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7626 5128 bytes
SHA-256: eb246e1d4d94affd03da5cc4181ebb2f164d0e372783f353b47008c8c0fe2f03
font_03_sfnt_off0000879e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879E 2048 bytes
SHA-256: 7d1d8f4167c36277c8fe71225fbdc31aaaca98204796b18c2f8b3e083a802a80
font_04_sfnt_off0000907d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x907D 13684 bytes
SHA-256: b754a0a0e4119e444934f73f374236460cb580fcd431721440fed807a9a2ead6
font_05_sfnt_off0000bb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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