Malicious PDF — malware analysis report

Static analysis result for SHA-256 a27ec2f45a16cb4b…

MALICIOUS

PDF

68.7 KB Created: 2020-12-05 23:49:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 09a5448228dd35695348ab0fd01fcc73 SHA-1: d15e2cad5639af28ffeb451b51f22a254e8c9c72 SHA-256: a27ec2f45a16cb4b72858a2971c119d2228812b94cf7f263358f102bde61a4d4
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier. It contains a link farm designed to redirect users to malicious infrastructure, specifically identified as a redirector at `https://gettraff.ru/aws?utm_term=indian+railway+reservation+app`. The document body, though heavily obfuscated, suggests a lure related to an "Indian railway reservation app". No scripts were extracted from this sample, but the presence of numerous external links and the redirector URL strongly indicate a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/aws?utm_term=indian+railway+reservation+app In PDF document text
    • https://mawosamaretezij.weebly.com/uploads/1/3/4/8/134860838/82bba3e13cc056.pdfIn PDF document text
    • https://sivubatololux.weebly.com/uploads/1/3/4/8/134850937/f309933a21.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/virur-natasaxas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5fb3638e2f663.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujodibu/30180710144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e807cec4-eecd-4dba-8c22-9fcca5c34f9e/phim_hay_lam_canh_tan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2b733f0-a1db-42dd-9b05-9139eaea7563/vezenirovulinofewuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9025b8a-8acd-45a1-9397-66e5191705cb/54875922472.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/job_cover_letter_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7dc19c-5a10-4600-b1ae-859c8daf8f42/seiko_sportura_watch_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/bavasebojiwari.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/adobe_indesign_flyer_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/valkyrie_profile_ps1_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEED 5144 bytes
SHA-256: d4cff96448606e5a40a9cbe34d5c1d96647989e9509fc9e964b27673614d3786
font_01_sfnt_off0000e098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 11140 bytes
SHA-256: 98e3ac6c5985bf973c2d48a4738646b5d19641b399a7abdc790402ed53444b66

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