Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a9b6e355c6d090…

MALICIOUS

PDF

38.9 KB Created: 2020-08-21 13:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 272ea7fca447321ff88d16c0da8a1979 SHA-1: cbaab8614207ac39b493dca4916e6398979db7a8 SHA-256: b2a9b6e355c6d0904ef34bd4c795856f5c7b8253a779e858b6fffe28ecb8693c
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with SEO link farms. One prominent link redirects to a malicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to removing ads from Android apps, likely serving as a lure to encourage clicks on the malicious link.

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=remove+ads+from+android+apps+apk In PDF document text
    • http://files.mass-visuals.com/uploads/1/3/1/3/131384424/bebabokumewonusameke.pdfIn PDF document text
    • http://nokevamun.thetwilightbarkpet.com/uploads/1/3/2/3/132303382/1525733.pdfIn PDF document text
    • http://files.maisonpumping.com/uploads/1/3/1/4/131483361/6649684.pdfIn PDF document text
    • http://ruzuxuxo.ahbuildingservices.com/uploads/1/3/0/7/130740051/5fae8730b40.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/1/0434/3998/0710/files/giresazesipuxometebelukaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4353/4486/files/sipefisebezanutuvav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3481/files/nubope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1131/7658/files/xibewezesuvubalugodux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/linunofitifomemibuvusanix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2624/9885/files/e5_93_aa_e5_90_92.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7263/4533/files/pajamamifipijim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/mowoxot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6099/9845/files/principles_of_agroecology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3698/2943/files/notedow.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 5

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_off00005ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB3 5284 bytes
SHA-256: e8f008ff4b587dcb14814158fe1eda5e0eaed8765fef10a82f100a0d5a523275
font_01_sfnt_off00006ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA8 10080 bytes
SHA-256: 38bb4856bfe236da6260569c8004081055f4fc2c6325bdcf5c8e982076a8c02d

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