Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d2cde3abd4793f…

MALICIOUS

PDF

87.7 KB Created: 2021-01-10 10:14:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8296b05dbd034e52d5118d772aaff8d4 SHA-1: f0ffd8b4659559b31a524b840b7f21dde4d9e6d5 SHA-256: 09d2cde3abd4793ffe4683dc3f47130e611b9da42c5e0eac28b9ca7664fc0293
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'traffine.ru' with a Facebook Messenger download lure. Additional heuristics indicate a PDF link farm, suggesting a broader campaign. While no scripts were explicitly extracted, the nature of the redirector and link farm implies an attempt to lead the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/wb?keyword=facebook%20messenger%20download%20for%20pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450428/normal_5fa748df38bb5.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/9864507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_5f93f3d4a7e48.pdfIn PDF document text
    • https://site-1177800.mozfiles.com/files/1177800/o_capital_volume_2_boitempo.pdfIn PDF document text
    • https://site-1179698.mozfiles.com/files/1179698/gobekasilododizipovufona.pdfIn PDF document text
    • https://gedobelega.weebly.com/uploads/1/3/4/3/134375191/341b89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444371/normal_5fde55e14205e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_5fb374a16d131.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kaxukok/39478689803.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/boma_2017_excel_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/beaglebone_black_datasheet_rev_c.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/dependency_theory_underdevelopment.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000118ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x118CA 23572 bytes
SHA-256: ebde1593d6d97e42ce4635b40ee43aa50373c7e02effad08f0cc23e7473f2def
font_00_sfnt_off0000e2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 5384 bytes
SHA-256: 3512dda93835cc85e6941403ca3dcbeaa83b0aac109498a7619750f27e9f2ec9
font_01_sfnt_off0000f537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF537 10572 bytes
SHA-256: faf86997adc74d86cff331075514f12f9c3222d4a921e350578bd3844ff2c7f3
font_03_sfnt_off0001432d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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