Malicious PDF — malware analysis report

Static analysis result for SHA-256 10376cd8d3b2a034…

MALICIOUS

PDF

69.3 KB Created: 2020-08-15 02:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44152c8c0d33388dde7410b7c40d79be SHA-1: 0c220fdb3e7bc949e39e7f79ea9f4a378923a0a6 SHA-256: 10376cd8d3b2a034589ec78639b9841ad4dfee5319a415d218895ed8e0c44076
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links designed to create a link farm, with a primary redirector pointing to a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of embedded links suggests an attempt to direct users to harmful content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

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=ascap+performance+fees In PDF document text
    • http://files.hdloolbox.com/uploads/1/3/1/3/131384777/9f804.pdfIn PDF document text
    • http://tisud.assemblyserviceil.com/uploads/1/3/1/4/131407995/cda8d8.pdfIn PDF document text
    • http://kepuzonem.morganestatesales.com/uploads/1/3/0/8/130874493/535332.pdfIn PDF document text
    • http://files.showjumps4sale.com/uploads/1/3/0/7/130740571/8558149.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/1/0439/3598/9915/files/nenuwafakijigeroporez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/xotode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/lozij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9822/5320/files/49670693241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/10329896364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7201/9877/files/ubuntu_shared_folder_virtualbox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/31651487520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/88920597102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/62996853258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/psicologia_papalia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2986/4343/files/basic_english_grammar_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/zotimizirejepinosupapit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/fanenuzuxipexip.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_off0000d1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FC 5116 bytes
SHA-256: 5a6057f2330ecd3c9aba0a9a8ca92cffb2b4d3aa1cd6d1d538b772a70844477e
font_01_sfnt_off0000e348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE348 10800 bytes
SHA-256: 0dc578d47d6eaee39a63d507f316ba48837a7662459f84fd11d09e6ed1b15484

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