Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7b717784079315…

MALICIOUS

PDF

40.7 KB Created: 2020-08-18 14:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d680ec14641d4e1d004de4dda94d3fe8 SHA-1: e32131fbb815d31b7ccb3fba978a145d2207f841 SHA-256: 9f7b71778407931564c6a303f0f5e847fa35eb3d34149705bfcf5e59f714ea28
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'homologous series of hydrocarbons' and the malicious URL. The presence of a link farm and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

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.com/pify?keyword=homologous+series+of+hydrocarbons+answers In PDF document text
    • http://files.dandimicco.com/uploads/1/3/1/3/131381414/mesezeka-najib-pekemajof.pdfIn PDF document text
    • http://files.berkshireheros.org/uploads/1/3/1/0/131070476/4ffe5b7.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/1/0435/6905/3854/files/benign_prostatic_hyperplasia_bph.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/arihant_bpsc_question_bank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/the_hobbit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/jotaburanubozuzuwawatudiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7411/7015/files/makigilajimomobitole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/viximapive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9883/8942/files/4245241676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/4330648791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/8853/8776/files/bastar_university_supply_time_table_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3661/3544/files/62147363518.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_off00006181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6181 5728 bytes
SHA-256: 2ce321ce4408c341166ae99c0c82391c128291a00603648ea4bfb46ddf713041
font_01_sfnt_off000074f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F0 9656 bytes
SHA-256: 984cd405048fc27e3302bf2f64b69757b331b3d6783a30b974973653400d74e8

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