Malicious PDF — malware analysis report

Static analysis result for SHA-256 80818c7367c2345d…

MALICIOUS

PDF

57.0 KB Created: 2020-08-11 18:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 704ccf60284fcfddc05da5f45f5bc1ee SHA-1: 3a7af57d64d3fafddb87214e032d57d28bf0861a SHA-256: 80818c7367c2345d88af51457813f1b61890b3817f44759d45d9a7bb7b029df6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits malicious behavior by embedding a large number of external links, many of which point to redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=golpe+de+estado+definicion+pdf', which is flagged as a malicious redirector. The document's structure suggests it's part of a link farm designed to generate traffic or potentially distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=golpe+de+estado+definicion+pdf
    • http://files.georgiahistoryteacher.org/uploads/1/3/2/8/132814343/putipodofoten_kalikud_bebesefoxatos_vorew.pdf
    • http://files.duggystone.com/uploads/1/3/1/4/131438056/980ac3e3408.pdf
    • http://laturewak.tangwenfang.org/uploads/1/3/1/0/131071252/vutufop-nabuvam-vagusozigaz-sijolo.pdf
    • http://files.ll.business/uploads/1/3/1/8/131857442/zudaxosumewuropege.pdf
    • http://pukez.winonaffa.com/uploads/1/3/2/6/132681352/6b750f6707.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/8332/3806/files/vlookup_hlookup_pivot_table.pdf
    • https://cdn.shopify.com/s/files/1/0432/1302/9540/files/81478116960.pdf
    • https://cdn.shopify.com/s/files/1/0435/2039/3375/files/gafinamerizarogasu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2697/9739/files/midis.pdf
    • https://cdn.shopify.com/s/files/1/0448/4333/5837/files/ankle_sprain_exercises_kaiser.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/1902346487.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/xupepolinibojujovasimofa.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/sunuvu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/64952008271.pdf
    • https://cdn.shopify.com/s/files/1/0432/8754/3964/files/jimored.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000091a1.bin
4b5ab5468a8144bd1f1f8b7dca8f3d3aacfd2aa348bcafc39b41260b015f0f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91A1 4872 bytes
font_01_sfnt_off0000a241.bin
eb4acdb223516dabc7e2a96d16f5e197263611b74116d828be738d1df1c21dbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA241 11368 bytes
font_02_sfnt_off0000c730.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC730 4324 bytes

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