Malicious PDF — malware analysis report

Static analysis result for SHA-256 353ed5ebe5016dd4…

MALICIOUS

PDF

44.7 KB Created: 2020-08-18 22:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a1df1d7157e76b5e146ccf14ce8e8d02 SHA-1: 5fa308706fbde8b20c0ef7a4dc6478beb5f56552 SHA-256: 353ed5ebe5016dd46cc503ae6ea491acaf5f3d7060abf33e15fc022d51562de3
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. Another heuristic indicates a link farm, suggesting an attempt to manipulate search engine results or distribute content. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, and also lists numerous other PDF links, some hosted on Shopify. The presence of these links and the malicious redirector strongly suggests an attempt to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=rest+api+documentation+template+ms+word In PDF document text
    • http://files.aoptech.org/uploads/1/3/2/6/132682303/bijuwe_duseru.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/1/0434/3303/3880/files/jojizikefexuxusakuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/jedibupew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/89969695052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/60366830320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/siwisogexiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/xutemofazir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/gazigebabugan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/83219296585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/29114690303.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 3

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_off00006a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8E 5316 bytes
SHA-256: 64c37b6d0884967d12ecd9f044d40ff42943cda9e4929035cb48210f0d12d331
font_01_sfnt_off00007c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9B 12228 bytes
SHA-256: b39857a8a257efefe41de99c2719b75a55b9994a3037306156f9fc037ebd4307

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