Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e155fc14564995…

MALICIOUS

PDF

41.9 KB Created: 2020-08-19 14:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ddfbd8ba4c36aa6744241c7fac8f674 SHA-1: 74b63e9c2bb0471a8e939a27c823c63ab398ba36 SHA-256: 88e155fc14564995a7c0220d2d62ae94d4b2fd042ce37525eb4a519290aa5bb1
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) disguised as a "risk analysis methods pdf". This suggests a link farm or SEO manipulation tactic to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the PDF structure and embedded URLs point to a phishing or traffic-generation scheme.

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.ru/pify?keyword=risk+analysis+methods+pdf In PDF document text
    • http://files.greenpiecenursery.com/uploads/1/3/1/3/131383763/25f634d38.pdfIn PDF document text
    • http://degabo.kingdommovementglobal.org/uploads/1/3/1/6/131606968/ad6da2df255f.pdfIn PDF document text
    • http://files.newleafkineticarts.com/uploads/1/3/0/9/130969061/zozeruratorinexawak.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/1/0433/7372/3800/files/uppercase_and_lowercase_letters_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3537/3213/files/chalte_chalte_movie_all_video_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/wivijutafemifubazetas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4458/6140/files/plural_of_irregular_nouns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/bridges_in_mathematics_grade_5_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2117/9802/files/93744533217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/38586333314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5733/0853/files/83585100248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1677/6868/files/all_routes_of_drug_administration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/metal_bending_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/79389453941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3880/files/sonorevofelolewunoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/fuledubap.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6707 5360 bytes
SHA-256: 678b5de6621c919cb162c3c5e6090650be006f8acc80b29d2149bee4d56d67c6
font_01_sfnt_off00007923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7923 9844 bytes
SHA-256: 77d88352688c0d871773bf3736200263d17c103719ab3c4b0be7a2faefa6fcf1