Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bc5884b68b1340…

MALICIOUS

PDF

47.9 KB Created: 2020-07-24 17:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce28d56bf352bcf9abab44db0fc29d44 SHA-1: 2460a8db202491f5ed3c63cfaae3fb26d46c8574 SHA-256: 96bc5884b68b13401279a8d0c6c23566ac8a994de287ed39b8a898acfbbf3803
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to a 'Resmed sleep apnea machine manual'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO manipulation to distribute the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=resmed%20sleep%20apnea%20machine%20manual In PDF document text
    • http://files.robertobertero.com/uploads/1/3/1/8/131871786/04a540ed9fe3c67.pdfIn PDF document text
    • http://files.rrrtag.com/uploads/1/3/0/7/130740128/gazizosawamoke_mekapinu_kikabuxiliko_mumofo.pdfIn PDF document text
    • http://files.workinnvision.com/uploads/1/3/1/3/131384018/zudemesenodevakani.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/1/0431/4244/7265/files/40253126107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5868/3294/files/37152348059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/xobenudawurakikilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/nazezirivuloro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/kigir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/72367989549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/sazebew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8869/0841/files/juvivekuvorarojuwam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/lexam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/13077278228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5733/2895/files/merowegivinomarelugef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/vipafasezubatiwat.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_off00007dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC4 4916 bytes
SHA-256: 6e5b86658622aad302e8c65c835c971f062d9a77c746d674e94b94a5fdda5b8a
font_01_sfnt_off00008e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3E 10504 bytes
SHA-256: fb7c18fea269b7a2ad115097c9f668cd0968bb30d29a03c27118433b46f2c503

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