Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a858d6278f9a77…

MALICIOUS

PDF

68.8 KB Created: 2020-08-23 05:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7df0d5af2bdb7831390020f35799794e SHA-1: bb37acbae0871e7e866dbea51dfad62cd4472d98 SHA-256: b1a858d6278f9a777b9de2bf739e5d01bc3e1e1799ca3af87280b3e2bdee3a7e
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure containing a large number of external links, a technique often used in SEO link farms to manipulate search rankings or distribute malicious content. One critical heuristic specifically flagged it as a 'PDF_MALICIOUS_REDIRECTOR_LINK', pointing to 'https://ttraff.cc/pify?keyword=campaign+meaning+pdf', which is a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The file's purpose appears to be to lure users into clicking these links, which likely lead to further malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=campaign+meaning+pdf In PDF document text
    • http://files.intentionalenrichment.com/uploads/1/3/0/8/130814874/mipavuw_pejiripomosuf_zowivixux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/25743046417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/behavioural_ecology_an_evolutionary_approach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/nirugolusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/56870817777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9268/0605/files/48103224087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5581/5583/files/bahadur_shah_1_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/tosidepudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/20787464793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/kiwinikimapoxuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/bio_free.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: cascadiannomads.com 6 samples

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000061df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x61DF 13252 bytes
SHA-256: dbb4a8b0e7af5cf8272bbaad3aadea34878c9ce453d164dd72f74cde3cc7a4ac
font_01_sfnt_off00008ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCC 4676 bytes
SHA-256: db5f8c8fca0c14d5a6c04a7a6209cf89f18a33ebd9e8235eff6047926488d850
font_02_sfnt_off00009c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8E 9796 bytes
SHA-256: a8cb3a8f890e97dc79c9534bb540e98a1da1f0f3c57b17bf54bed01d4c149056
font_03_sfnt_off0000b7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FE 10844 bytes
SHA-256: fbb54c0a56bdf820a07a6e1b1541f1d59f023126ca5e1560e9821eccf4aab9d3
font_04_sfnt_off0000dd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3B 17476 bytes
SHA-256: 17855735673a29c88710480ecd39a453f25f4ee877539cd13855857389c32955
font_05_sfnt_off0000f758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF758 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f