Malicious PDF — malware analysis report

Static analysis result for SHA-256 86166c2f3920bdd4…

MALICIOUS

PDF

63.9 KB Created: 2020-08-18 20:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d50945588fc2f3a91c593cc3988574c4 SHA-1: 868a87f8b494fdfbde3d971b65b271b40aa515a9 SHA-256: 86166c2f3920bdd41df2920c591ab025199762c73b8bd6c486d351a2ebf16e8f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users into clicking it. The presence of a large number of PDF links indicates a link farm SEO tactic, likely to improve search engine ranking for 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.com/pify?keyword=cardiomyopathy+definition+pdf In PDF document text
    • http://levosogap.glennhousevr.com/uploads/1/3/2/7/132740930/2080770.pdfIn PDF document text
    • http://files.qacloud0.com/uploads/1/3/0/8/130814254/wamatexabidem.pdfIn PDF document text
    • http://files.nikkiallred.com/uploads/1/3/0/7/130738889/fogobobexukud.pdfIn PDF document text
    • http://xovenej.cascadegriffs.com/uploads/1/3/1/8/131856372/rifetijejixegamaw.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/1/0431/0764/7639/files/laperevikatasivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/6281240818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/amphioxus_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/pugasefopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/contaminacion_atmosferica_causas_y_consecuencias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/grooveshark_playlist_recovery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/lemomekudorevevikub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/26560870171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/android_samsung_mobile_phones_under_4000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/weginekexitipatukeketok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/wdc_smartware_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/start_mysql_server_mac.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000986a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x986A 2868 bytes
SHA-256: b41bea1b6452f752dbfebed22a84b2b90fbc40f7202eadc28c3945cc57bd146b
font_01_sfnt_off0000a29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA29D 5076 bytes
SHA-256: 7bf1d34f039f76bfd6b1134ce82b3763dd29be0a9b941d2f9c657f67247c5636
font_02_sfnt_off0000b3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3CA 12608 bytes
SHA-256: dead337314529a9aff37a1b4816511c1fea7f443aa69c5b83ba499c2e33c6d96
font_03_sfnt_off0000dc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5F 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd