Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa8d0c22e983992…

MALICIOUS

PDF

48.8 KB Created: 2020-07-27 07:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6c91e708a05fcbe7751e69f9621ecc7a SHA-1: 0675dba496d6dc6477c2845224ad667a293f9458 SHA-256: cfa8d0c22e983992ecc3d76a2b66bd227ffa4b9e24268c7e3597b912a62dc31e
194 Risk Score

Malware Insights

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

The PDF file contains a deceptive document body masquerading as a news report about drugs. It embeds a significant number of external links, with one critical heuristic identifying a link to a known malicious redirector. Another heuristic flags the document as a PDF link farm, indicating a large number of outbound links, many of which point to Shopify domains hosting other PDFs. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=example+of+news+report+about+drugs In PDF document text
    • http://files.lacla.us/uploads/1/3/1/4/131406701/5208991.pdfIn PDF document text
    • http://files.athleteslab.org/uploads/1/3/1/4/131455283/4e91c04a8bce7ac.pdfIn PDF document text
    • http://files.dsppsu.com/uploads/1/3/1/8/131872238/6978050.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/1/0434/6976/6808/files/lotugure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/77476651257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/nutabib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/96366439887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/78936415574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/solimabovavigopes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/wajufuxokesapipenisexajun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/41686504043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/povovinuduseze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/51404807180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3151/0690/files/54748200635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/23768333474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/kabepomefeba.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 5

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_off00008161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8161 5452 bytes
SHA-256: df36e9ce2e4beaaf82fc3c0282a5f8a2f945286213151f56b74ce25d221d0c36
font_01_sfnt_off000093e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E8 9924 bytes
SHA-256: 336fb5abf1890b719cf4593832de1526cdc57cf7ff4445c2be5b6e363241be24

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