Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f3d496fb4668b9…

MALICIOUS

PDF

41.9 KB Created: 2020-08-18 23:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 08158d71c4ae8c437ef7655c8f927374 SHA-1: 50a3a03d6cd3032e1569f41566c8029bcd435dae SHA-256: 39f3d496fb4668b92de148a109a1dd9187b0612a81ff12a2248dfd93ef6cdd8e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at `https://ttraff.com/pify?keyword=ios+background++crash`. The document body, though heavily obfuscated, also contains this URL and references to 'ios background crash', suggesting a lure for users seeking information on this topic. The presence of a large number of external PDF links, many hosted on `cdn.shopify.com`, indicates a link farm strategy, likely to improve search engine ranking and distribute 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.
  • 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=ios+background++crash In PDF document text
    • http://files.thebettajivereview.com/uploads/1/3/1/4/131437242/wibuganaforiwu.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/1/0432/4468/3419/files/bandit_s_moon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/karemogupurujoruwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3591/8489/files/42553314841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/batogoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/ninja_blade_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/tewevemodamujoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/52651808695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/pdf_bestand_verkleinen_om_te_mailen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/batopijumupafudido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9025/4749/files/age_hardening_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/82058191915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/2269/9943/files/72960963713.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 3

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_off00005bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD1 5308 bytes
SHA-256: c9be9008688ad636c5b6fbe05aba08c82858ee3017552bbd579749a6651fc5cf
font_01_sfnt_off00006dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD7 14256 bytes
SHA-256: e5aca1bbd4fefcbba6d9c3bc6a72d3ba18397e81c82207b04aad29ab3054374c

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