Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb4dd7271aeccb8…

MALICIOUS

PDF

59.2 KB Created: 2020-08-21 04:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 385f7c87efc4165f5f484399643f9fcf SHA-1: ac023e41dcb87446db714a7dfc584953ae453ade SHA-256: afb4dd7271aeccb82841091bc14fd6da18426ac46c9753fac8495f7ff435c275
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, another critical heuristic identified it as a PDF link farm containing numerous external links, with the primary one pointing to a redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic.

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=angular+5+bootstrap+login+template In PDF document text
    • http://wumeti.mothersforothers.org/uploads/1/3/1/6/131607310/lubusuwemukiruz_dogafogamisi_vipamamijakena.pdfIn PDF document text
    • http://jiroxifak.lexingtonservicesolutions.com/uploads/1/3/2/7/132710567/fojaxub.pdfIn PDF document text
    • http://files.krystalwatersystems.com/uploads/1/3/2/6/132695818/4744849.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/1/0439/1269/1867/files/59932785404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/how_to_improve_your_vocabulary_skills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7770/1533/files/must_should_ought_to_have_to_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0898/3203/files/58668938777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4614/9023/files/mitawepidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/84411691003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/62537007726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/apache_poioptions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/0382/3516/files/awd_manual_transmission_cars_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3206/7748/files/23034704960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4201/2327/files/sozunarafupuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/givufa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96DD 5392 bytes
SHA-256: 3e49168afe8428cac91412354f991aced9f8fdd66dbad50314001a78d3a860aa
font_01_sfnt_off0000a91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA91B 16996 bytes
SHA-256: e193f5ccc79902351c2ee761b699fc717bd79fac3ff09b023c61b612da8369a1

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