Malicious PDF — malware analysis report

Static analysis result for SHA-256 350e7a980723d144…

MALICIOUS

PDF

50.7 KB Created: 2020-08-03 09:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d89acaa3346e1ad8c4fd2a3495cca245 SHA-1: 760a51c381084ba46bbddceb25c09238b73880ca SHA-256: 350e7a980723d14454ca90b8fbd7868c08d9afffd01257084bae424a1f305e67
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text suggesting academic content ('Artin algebra solutions') and the URLs themselves are often hosted on platforms like Shopify, likely to disguise malicious links as legitimate files. The primary attack pattern involves redirecting users to malicious infrastructure via these embedded links.

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=artin+algebra+solutions In PDF document text
    • http://files.suzettemacgregor.com/uploads/1/3/1/3/131380052/6441908.pdfIn PDF document text
    • http://files.lestheredblog.com/uploads/1/3/1/4/131453784/fb7771dd597b.pdfIn PDF document text
    • http://files.nownotwhen.com/uploads/1/3/1/8/131856627/nepelabesigas.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/1/0434/7743/4525/files/fakepazedilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/wukakaperapevomoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1892/7778/files/tepebijivab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/nibivogaropopow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/south-_western_federal_taxation_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/zurutijivigoroseru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5719/2853/files/najilorafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4933/6483/files/2006_kx450f_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/78541065121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9128/7461/files/74089510118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/pevesokirokameken.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_off00008742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8742 4984 bytes
SHA-256: 541dabaf8f827403b92b5c94ab6cb88d450290a63e71c93acbbd8caa9f718a55
font_01_sfnt_off00009841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9841 11208 bytes
SHA-256: b93547457b0610a6c84a9982330bbbe42c90a24550919757e8d29c7d4c9e062a

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