Malicious PDF — malware analysis report

Static analysis result for SHA-256 7574ba8c8b27b5b0…

MALICIOUS

PDF

92.3 KB Created: 2020-07-24 15:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 465cd5ffd5ced68f874ffe06b85b5ffa SHA-1: 10816fa8937877b7b11e3b6baebcf269f03ea80c SHA-256: 7574ba8c8b27b5b03d6853b33bbdd1aafd65b5607cbafa3de0a5190fdd795073
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1553.005 Security Software Tampering

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a download for Anaconda Python. The document also contains heuristics indicating it instructs users to disable security software and provides a password for an archive, common tactics for evading detection and delivering payloads. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=anaconda+python+3.+7++windows
    • http://files.eyemaxmono.com/uploads/1/3/1/1/131164383/zivakajamoj-xivapafodi.pdf
    • http://files.kindergiveitback.org/uploads/1/3/0/8/130873893/c056128619f0.pdf
    • http://files.pieceofcakeiowa.com/uploads/1/3/0/8/130874300/rejalif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8527/4024/files/falaxamuluwikemeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/66571545813.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/lavivugolipujonegekajave.pdf
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/88721515862.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/xovitaras.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/36862408496.pdf
    • https://cdn.shopify.com/s/files/1/0430/2870/9539/files/povagutitovulasajon.pdf
    • https://cdn.shopify.com/s/files/1/0434/6835/7796/files/voxilawudimu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56325204281.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/rowilinuwefawixejupetu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7052/0470/files/93315413924.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012228.bin
3cee770cc88a5f8787cc8fd9f04698d850c6c40ebee67d8089030520bce253a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12228 5164 bytes
font_01_sfnt_off000133c6.bin
89e350363f2c4de87a72547876a9246c1c5e5662cf8584ff839f28073283984d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133C6 15372 bytes

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