Malicious PDF — malware analysis report

Static analysis result for SHA-256 b849e650758c9605…

MALICIOUS

PDF

44.9 KB Created: 2020-08-24 04:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37522ffb212559521c3284de09ee22f9 SHA-1: 6b5b07fbddf2c383b22d73c21c11546ff9b6230e SHA-256: b849e650758c9605966c8b7719c27b2fd8b0fbaf7bb02224d2673cf371a7afc2
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains text referencing 'swarm robotics ppt free' and the malicious URL, suggesting a lure to download potentially harmful content. 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=swarm+robotics+ppt+free In PDF document text
    • http://files.oregoncarehome.com/uploads/1/3/1/8/131856290/9234235.pdfIn PDF document text
    • http://files.shopelevateonline.com/uploads/1/3/0/8/130813654/fezelumaxebit.pdfIn PDF document text
    • http://files.worker-studio.com/uploads/1/3/0/7/130739544/pigerawurufomo-gekudamuzosi-ratudarila.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0464/8678/2120/files/20417900092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9997/1999/files/13911863524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2024/7194/files/tamis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/realistic_minecraft_resource_packs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/viwamabakarenidasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/easy_division_worksheets_for_2nd_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7492/9308/files/wigafuline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/wugerun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/tuwewowubowuvavomada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2064/6562/files/dunemej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7593/6157/files/rolamawajadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0449/1936/files/keguku.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 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B6 1732 bytes
SHA-256: 57a49ae34918282678801e15ef553ce5370cd2129b0ec3b785994947a695542b
font_01_sfnt_off00007043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 5464 bytes
SHA-256: 19ff39dce90ad8dccd4ac5cf5e969a4625e418686bcf6b0bf2984de85f2e992b
font_02_sfnt_off000082c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C7 10312 bytes
SHA-256: 0c83a57c2205c90c3bb464a94ad87bbe94a84d56bf28e2e0a2f4cbb9bb73eb9c

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