Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6ca7e52d0d4909…

MALICIOUS

PDF

42.5 KB Created: 2020-11-05 17:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b417b7a93d5eb2ba4011d562dd1d0a0 SHA-1: 7caf57f5d165fae539c456e53951d838ed083681 SHA-256: 2d6ca7e52d0d4909b098a2d01c7ae4a37901fc5a7c1b9ea1c4fdee18d6140005
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to known malicious redirector infrastructure at `traffmen.ru`. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect the user to harmful content. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?keyword=lilliput+lane+price+guide
    • https://nifadajenekipib.weebly.com/uploads/1/3/4/3/134305148/kozupiridivemexomutu.pdf
    • https://papuxivosep.weebly.com/uploads/1/3/4/4/134491017/tuwetises_gowowiwuraveroj.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/bajibofejexonib.pdf
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/bumesuwepupik-korepemu-ludilunudavukiz-vuzagomasanakex.pdf
    • https://zutofamofiselas.weebly.com/uploads/1/3/4/0/134040676/0f18a3a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/19e99baf-673d-4ac0-8be0-de4e6802ebbc/chapter_17_to_kill_a_mockingbird_summary.pdf
    • https://s3.amazonaws.com/rekibedafowow/mamma_mia_2_parents_guide.pdf
    • https://uploads.strikinglycdn.com/files/fe54c6b7-468f-4ccd-9b24-5ebafaafad3e/american_classic_1377_manual.pdf
    • https://uploads.strikinglycdn.com/files/21e3bafc-8d92-4d40-81e1-731b3c131196/acids_and_bases_practice_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/07f58f4c-441e-48b3-9392-f01687a8e1bb/99704036897.pdf
    • https://uploads.strikinglycdn.com/files/d8c597ca-cb88-42d2-afbf-4ffa817c5a17/jomodetefaxabomosazab.pdf
    • https://uploads.strikinglycdn.com/files/53becf7d-2e86-45e3-a55f-d786437aaa7d/94076301644.pdf
    • https://uploads.strikinglycdn.com/files/42fad40b-59c7-4d3a-ae83-be5135518fb2/3267505810.pdf
    • https://uploads.strikinglycdn.com/files/fcc2e9de-45e5-405c-8ede-8d63c7fa1399/peripheral_route_persuasion.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_off000062fc.bin
ead08cf9cb7d2e4a69bc78fbdc4efd7232a9719469b21c128661d6cc550f307f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FC 5004 bytes
font_01_sfnt_off0000740e.bin
3f59e969ddee72ec064749cf5872b89ad0e42255b5e8591c1abdc2427038610c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740E 12276 bytes

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