Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d96822bfa32c1d…

MALICIOUS

PDF

49.0 KB Created: 2020-08-21 17:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cd50ca613a4d0029795dd47dfb0a43e1 SHA-1: bbb536a37914f0ff833078f0955780701451a488 SHA-256: a7d96822bfa32c1d460a004d37e0bce46c523c4f767745c81d54c51f899a43e3
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to interview questions and the malicious URL. This suggests a social engineering lure to trick users into visiting a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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=commonly+asked+interview+questions+and+sample+answers In PDF document text
    • http://files.adelaide-pilates.com/uploads/1/3/0/7/130739761/zijupepojumoviziwese.pdfIn PDF document text
    • http://veruwajit.trinahoadleyphotography.com/uploads/1/3/0/7/130739775/gumojemewa_nobemedemim.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/1/0431/1125/2132/files/gijewaguf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1103/9655/files/69938218800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0278/0057/files/joana_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/biboguxozomowitil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4175/8101/files/balak_palak_full_movie_480p.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/rivitopanoserolel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/vehicle_dynamics_gillespie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/nurizititevefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/52934704071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/discord_roleplay_servers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/soccer_score_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/risetirowulikaketevot.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 8

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_off00008139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8139 5452 bytes
SHA-256: 62ed6d27aef2d116af91a1bf33fb7fe0afd462198afc4d4b9dbe0255ad79080c
font_01_sfnt_off000093c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C1 10272 bytes
SHA-256: 1e9e7204d1fae5dc48d3e059fef5149371e9509932030ca4f884363d87de082f

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