Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c65db60c5d7e7c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-04 08:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0c3c75e08e1fdc5c6b4c3a8bbbb394f SHA-1: 399e95eb3fb250119a695cdd38d57d333ae7e8fb SHA-256: 44c65db60c5d7e7c19ab02b85c7013e22220784d116e960ea55cedf854299ece
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a redirector to known malicious infrastructure. The majority of links point to PDF files hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The document body itself is largely unreadable, but the presence of the malicious redirector URL is the primary indicator of malicious intent.

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=exercises+for+herniated+disc+in+lower+back.+pdf In PDF document text
    • http://files.parentfirstcouncil.com/uploads/1/3/1/4/131452922/917976.pdfIn PDF document text
    • http://files.staysweetnicolas.com/uploads/1/3/1/4/131453060/witilezi.pdfIn PDF document text
    • http://files.newbeginningswalworth.com/uploads/1/3/0/7/130776841/tunanazopab.pdfIn PDF document text
    • http://files.heartlandusgaa.com/uploads/1/3/2/7/132710704/3586731.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/1/0432/6726/0576/files/calculus_jon_rogawski.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3947/2288/files/adverbs_of_frequency_position_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3887/3512/files/72269393131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/vowarus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/liditawimarironudamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5951/9394/files/48087409091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/rujesuxubupabigaxowemabod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3840/7832/files/37484316659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2042/7157/files/jugekupowaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/56355286935.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642A 5596 bytes
SHA-256: f0cabc34e9f2d00af0f39f316292ad1a90b101265e68686e6ad007dc2c463f07
font_01_sfnt_off00007743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7743 10352 bytes
SHA-256: 5379f0ba053a0f9bbdca2ded7ddb3b6aaf54dca0dc880350ccae7d26946f6cc7

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