Malicious PDF — malware analysis report

Static analysis result for SHA-256 389e73cb6fc0d41f…

MALICIOUS

PDF

32.4 KB Created: 2020-08-21 19:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2793ec1ba93d29f0203618378206015 SHA-1: f444e1fde73ed81608e15b97be72d3ba6ebf6822 SHA-256: 389e73cb6fc0d41fb11f905b2983c151ed56b063b283a6c59145f0b6b1e09f32
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The primary malicious URL is https://ttraff.cc/pify?keyword=age+calculator+app+apk, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to the malicious URL and other external links, reinforcing the social engineering aspect of 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.cc/pify?keyword=age+calculator+app+apk In PDF document text
    • http://files.theapostoliccommunion.org/uploads/1/3/0/7/130738978/2941146.pdfIn PDF document text
    • http://files.blackhawkbrigade.com/uploads/1/3/1/4/131455198/tevuzizube_fuwimobave.pdfIn PDF document text
    • http://files.ef-gsm.co.za/uploads/1/3/0/8/130814232/faniwodidej.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/1/0430/6151/0293/files/96903787092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/babafideti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/jurnal_bronkitis_pada_anak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7054/5308/files/vuziguwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73930450062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/miwutozikuzezomix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/sokevejazididofozaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2119/5688/files/78229748602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/bharat_acharya_microcontroller_book.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
🗂 Part of campaign: blackhawkbrigade.com 3 samples

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_off000041cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41CD 4976 bytes
SHA-256: 2776ebc96ea98f585664cb7d2446451e1774d8dc10391e5a2cd2d69b943acb1d
font_01_sfnt_off000052cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52CC 10096 bytes
SHA-256: b34a415727dc638a905711bd276f20c1a822c327f860306a8932bb2d5410d1f8

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