Malicious PDF — malware analysis report

Static analysis result for SHA-256 881f8a77a75b5841…

MALICIOUS

PDF

42.6 KB Created: 2020-08-20 15:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 28da6dde1e23b20ae6d949d9eb1893a1 SHA-1: 55bdd457860755ec5d8f8eb4e6bca949403404d0 SHA-256: 881f8a77a75b584116eaa5836d55107dc7f3b3e3e9552c70f2c01a87818409be
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme. This indicates a phishing or scam attempt designed to lead users to malicious content.

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=android+10+huawei+p9+lite In PDF document text
    • http://files.linyuaner.com/uploads/1/3/1/3/131398140/ff68b.pdfIn PDF document text
    • http://files.reveal-and-heal.com/uploads/1/3/1/4/131438843/kedonizupule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6186/0757/files/los_primos_mx_mi_bello_angel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/suloperuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/mupupavorufubinetezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/dabiparesavozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1523/3959/files/81178123748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5692/9687/files/welixowadilisenujotatop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1284/8790/files/kifutujozevemilakawumur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7505/7302/files/lal_chunariya_movie_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/busutes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/xewuxefiwaxepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96280370261.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 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000688f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x688F 5300 bytes
SHA-256: fe7d418557abcd5b7a2c20d6de6be20054447113930ad0e0d205d06dc6b92ff7
font_01_sfnt_off00007aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA1 10280 bytes
SHA-256: 7a5c7d3633c15b5faab73fc2c79a40a34e58b826a784ec5aad1732eeab3bbed0

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