Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74280bdf00c8a5d…

MALICIOUS

PDF

36.5 KB Created: 2020-08-16 17:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d9553067b5a5cc4b1f5703fd41646f2 SHA-1: 69810f95f3d0316534daae8e0c2764de3cf2edd5 SHA-256: c74280bdf00c8a5dce9645d552d4e838051ab42c7fb15379617300ea2d805d43
194 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to appear as a legitimate download for an 'Adobe PDF converter'. The primary malicious link, https://ttraff.ru/pify?keyword=adobe+pdf+converter++apk, redirects to potentially harmful content. The document's structure and embedded links strongly suggest a social engineering tactic to trick users into downloading malware.

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.ru/pify?keyword=adobe+pdf+converter++apk In PDF document text
    • http://files.hasaonline.com/uploads/1/3/1/4/131453124/netegute.pdfIn PDF document text
    • http://files.anamnostoshouse.com/uploads/1/3/1/0/131071145/tavak.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/1/0437/7670/4664/files/53001203103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/sengoku_basara_ppsspp_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/allen_carr_lose_weight_now_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/delududilubupet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11411440246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/vetusokisexaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3626/2050/files/kixowebesoxurijopurigone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/jivukisovixuxefitapoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1442/2687/files/getomebopenuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/zumunenalokerilese.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_off00004f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F12 5192 bytes
SHA-256: e158ee685b581b2bc57026add7bda2c4773dab9aebf585b09a51d3b5494b3f84
font_01_sfnt_off000060cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CB 10824 bytes
SHA-256: 93b87cb95641e8572bc8c25b0da01f06fc5698cbca38d60bd1c47df05a1aef8d

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