Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5de4daccd14ddf…

MALICIOUS

PDF

48.2 KB Created: 2020-07-30 14:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3affa2cbec1add5d368d393b2ae4969 SHA-1: b69342cde5a05dbcfe27ae15a7a483d37c289a6d SHA-256: 6c5de4daccd14ddfa3e56dca0caa6e6917cf2dee7ef16d0f65bdb38612c1450a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF that contains numerous links to external websites, many of which are identified as redirectors or part of a link farm. The primary malicious URL, 'https://ttraff.ru/pify?keyword=membrane+potential+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'membrane potential pdf'. The ML classifier also strongly indicated maliciousness.

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=membrane+potential+pdf In PDF document text
    • http://files.allisonattitude.com/uploads/1/3/1/8/131872087/dudobikuluru.pdfIn PDF document text
    • http://files.bisonsbikes.com/uploads/1/3/1/0/131070792/wigufob.pdfIn PDF document text
    • http://files.ifindoubttravel.com/uploads/1/3/1/4/131452922/nirowevaxazedem-rokevo-kasod.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/1/0434/3886/6593/files/zekafumibebafikejuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/15276526651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9649/0663/files/372586173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4925/5061/files/gipuxirojaxaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/tobaguratixukavunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4569/0266/files/mijejojamujuniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7002/1014/files/ferozuzutabubotunawajit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5317/1356/files/29911627597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9290/8963/files/lijegukor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5327/6574/files/kexurixopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9675/0746/files/nazawezosuxutumafiroferuk.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 7

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_off000072d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D9 4944 bytes
SHA-256: a503ae0e0209f8f209ddff51614224874221a8a6371ed3df3c2984f9455380ed
font_01_sfnt_off00008385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8385 15748 bytes
SHA-256: b8c67643563caa056efca87733570ba99b716816fe11722b55354a7b0f843064

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