Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa66c608b307cf4…

MALICIOUS

PDF

43.0 KB Created: 2020-08-14 18:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5971f47eca9cf026ec4ab325d81b28d4 SHA-1: 17f31ecc42801c3463c9698ca6de8fefff47092d SHA-256: ffa66c608b307cf44a87852336872d7414f0462a913401903e5d0b942263f26c
162 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common technique for delivering malicious content. The document body, though heavily obfuscated, contains text related to a 'calculator app for mobile', suggesting a lure. The PDF also hosts a large number of external links, many pointing to Shopify, which is indicative of a link farm used for SEO poisoning or distributing malicious files.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.com/pify?keyword=calculator+app++for+mobile In PDF document text
    • http://files.quasilocum.com/uploads/1/3/1/3/131380733/dazepip-tefifipipewesex.pdfIn PDF document text
    • http://files.spiderbikemaps.com/uploads/1/3/2/6/132695455/8734099.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/1/0435/4365/8650/files/83744417055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/4529/5004/files/66664044307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/fuwotegebola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6028/0992/files/marvell_91xx_driver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/bakejilimawob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/95369802068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/mixufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7584/5792/files/76849885287.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_off000069ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EA 5028 bytes
SHA-256: 3a1ea26249053419b8a168c55a50c7a52283633f942aacee176bd9471b4055bd
font_01_sfnt_off00007aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEA 10412 bytes
SHA-256: bfbb33b04c1a5262d25001ae9b2f412a6a4c27c85cfa9d1cb569a672ecc95f22

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