Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6ce7234474663e…

MALICIOUS

PDF

34.4 KB Created: 2020-11-07 01:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6ecdd2ac7f3e0ab4d12b0f4139d0e242 SHA-1: e94ffddc388de53e704678b09978fcfe762c894c SHA-256: 9f6ce7234474663ec8852cfdd28d6cf4e1e62987f32fc0d2be5cc0405c30416e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure, employing an image-based interface to conceal clickable links. It contains a high number of external links, many pointing to disposable hosting, and one critical link redirects to known malicious infrastructure. The primary malicious URL identified is https://ggtraff.ru/aws?keyword=13.5+cycling+of+matter+study+guide+answers, which likely serves as a gateway to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 34 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/aws?keyword=13.5+cycling+of+matter+study+guide+answers In PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/tipizikowog_fakobejab.pdfIn PDF document text
    • https://jivenikovo.weebly.com/uploads/1/3/4/3/134308789/konakinila.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/nekopogapafuror.pdfIn PDF document text
    • https://nonesuwenuvav.weebly.com/uploads/1/3/4/4/134400251/f764189053.pdfIn PDF document text
    • https://guxitubekin.weebly.com/uploads/1/3/4/2/134267073/wubavelejag.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/liwirenifinavit.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/vuputexulokozek.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/sesafefanulokam/39327490211.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/awesome_tanks_1_level_editor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0583597b-431e-42f1-b9d7-d6854f6fff1c/exercice_nombre_dcimaux_6me.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/tenant_agreement_form.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_off0000400b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x400B 5692 bytes
SHA-256: abb8caeea2922339b53f3dc02854fbcfe42b5dde1a038425cbbc8625d059c58c
font_01_sfnt_off00005364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5364 8124 bytes
SHA-256: eea5ac5e017398a43716a49cea71a497803188a506ee7d0b86e734867342dfcf
font_02_sfnt_off00006efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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