Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b857b350b452420…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 11:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba0f36e5b2b1f31482c1156dab22e4ab SHA-1: c2020a2fde8b4688b6f3061f669ac6d8e226b68f SHA-256: 7b857b350b4524201e57a94e1e0e0e59cbe3c57374c7275eab9b9dc1f5184d70
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics and IOCs. The ML classifier strongly indicates maliciousness, suggesting the primary goal is to redirect users to a malicious site, likely for phishing or malware distribution.

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.cc/pify?keyword=define+performance+appraisal+in+hrm In PDF document text
    • http://files.bohooils.com/uploads/1/3/1/4/131437924/xofovanulurede-nimoxobuzilefek-xuxuwovi.pdfIn PDF document text
    • http://files.vanessamulton.com/uploads/1/3/1/8/131871745/44f680d7d78.pdfIn PDF document text
    • http://files.gandaconsultinggroup.com/uploads/1/3/1/6/131637273/nobekimuxugiwu-zezibowilikim.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/1/0435/5391/5043/files/google_chrome_32_bit_terbaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/ffxiv_hunt_locations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/3857691539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/english_test_pre_intermediate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/rojamikiterizilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1236/6231/files/crosswords_with_friends_answers_4_10_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/98962253030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8779/7151/files/35023857075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/rune_factory_4_fishing_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8537/9237/files/mojifik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5286/6467/files/nomura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7811/3697/files/tafinegiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4793/4359/files/ketogenic_diet_grocery_list.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_off000064e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E5 5252 bytes
SHA-256: 8842311b71ffc409e1fe301beaf04943ad06ffb55deb7091ab442671abe71ca9
font_01_sfnt_off00007696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7696 10428 bytes
SHA-256: 6d994768334ede9eb9ff5487dd9e3988b9805afd853fb3d00b43efc6301f0899

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