Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59fd61f2ec34a7b…

MALICIOUS

PDF

72.0 KB Created: 2020-12-24 13:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1f27a997c4063facac798015cf57a8c6 SHA-1: 708b6c1fedb41991c7aa3a7e478be85eacfedfaf SHA-256: d59fd61f2ec34a7bbd1bdb27d5f152228f80bfab5784e2f094157e1d0bf3840b
254 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm and the general nature of the embedded URLs suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/aws?utm_term=reveal+wifi+password+android In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369927/normal_5fe307da584e9.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/cijjdaE/natika.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/gjtWUBR/96467712400.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414691/normal_5fde6249cd03d.pdfIn PDF document text
    • https://cdn.sqhk.co/juvexafi/Sebaq34/mumbai_metro_card_recharge_phonepe.pdfIn PDF document text
    • https://tozusasulinun.weebly.com/uploads/1/3/4/8/134872335/c1da7422d44.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/giqihig/77790681392.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://uploads.strikinglycdn.com/files/51804a17-9051-4dee-a706-3022cc6e9f7a/western_religions_vs_eastern_religions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908ea1d1-49d4-4384-aff6-5a3cae70ab98/18069452407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc7bab0-e82b-4427-a070-9bcb2181fe53/buy_here_pay_here_wilmington_de.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa294fb8-a5f7-4989-b406-9cfa448cff1f/kanikanum_neram_mp3_ringtone_downloa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83054c52-35ad-474e-a0c3-d783f3b3600f/lumutapamuteme.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/fosedafudos.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ced2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED2 4904 bytes
SHA-256: a6af26e07be9163baff386f40e4bf1e9244a2c0443d705c725a81670d288b718
font_01_sfnt_off0000df99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF99 10976 bytes
SHA-256: d778a75a29c12759fc772cdcb9330113b0a25d9a9c30022353d13fd2852487e9
font_02_sfnt_off000104d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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