Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e7d335d8720f9c…

MALICIOUS

PDF

85.8 KB Created: 2020-12-22 06:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48a11ae33367b0559c0607a083aa3891 SHA-1: 1a594dba3fb2e4564e7ab563981df9e6055599ac SHA-256: 88e7d335d8720f9cc5d8d20b33244f960d8f640533addab1a737e87beff63561
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is indicative of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a reference to 'Axel from angry birds 2 voice', likely a lure to entice users to click the malicious link. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=axel+from+angry+birds+2+voice
    • https://cdn-cms.f-static.net/uploads/4384647/normal_5fa356df36903.pdf
    • https://cdn-cms.f-static.net/uploads/4480749/normal_5fbcc57d24aa5.pdf
    • https://static.s123-cdn-static.com/uploads/4460255/normal_5fdf76d7ab551.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc68d526b97992eb5827da1/t/5fd665bc102ca46975e3825b/1607886275659/jimog.pdf
    • https://s3.amazonaws.com/wepeliniru/burke_county_powerschool_login.pdf
    • https://static1.squarespace.com/static/5fdc826ac3cfda2dcf0aa550/t/5fdcd27fe6fc5f5a915e75ee/1608307327705/advertising_slogans_quiz_and_answers.pdf
    • https://static1.squarespace.com/static/5fcf55bff6115a45885bbb9c/t/5fd6b46d89566e781f5bc8e3/1607906413254/96136901224.pdf
    • https://s3.amazonaws.com/gajabedafot/kasej.pdf
    • https://s3.amazonaws.com/jupudizadid/comparison_slides_templates_free.pdf
    • https://s3.amazonaws.com/jefobexapulow/pkp_bielsko_biaa_telefon_informacja.pdf
    • https://uploads.strikinglycdn.com/files/0e616dd7-caf6-4a13-8f31-6ea94f8b86b6/lavaf.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_off000103cf.bin
2b6d37f618fcd62bd045305bbf996d6f61cdf54a64e43be705c30e5ec8c3ba92
pdf-font-stream PDF embedded font (sfnt) at offset 0x103CF 5832 bytes
font_01_sfnt_off0001179d.bin
d4c28e351106b485bb452b8c3d52ae4032fb34fffb029db96304f01691da906c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1179D 1948 bytes
font_02_sfnt_off000120ee.bin
7ca8360d70b6146d157ee24b46d1994a40d5aaba7ffd5a73b363165f19e7df5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x120EE 12068 bytes