Malicious PDF — malware analysis report

Static analysis result for SHA-256 9feceeb6f2e81619…

MALICIOUS

PDF

50.5 KB Created: 2020-11-03 12:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00fc763bb60c3cc4d5dff98562fb77c0 SHA-1: 739397b4e47cec8566394f6aa7762b284f005624 SHA-256: 9feceeb6f2e816192ee981fe24047e69ab89c8a78230cbdf6cfadb76fb3c5342
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and contains a significant number of embedded URLs, indicating a link farm or redirector strategy. One of the embedded URLs, 'https://gettraff.ru/aws?keyword=history+alive+the+ancient+world+19', is associated with known malicious redirector infrastructure. The document's primary function appears to be distributing these links, likely for SEO spam or to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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?keyword=history+alive+the+ancient+world+19
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/9bc1f.pdf
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/79aca56bdf.pdf
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5f9c1d875b632.pdf
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f8c1d8ac0971.pdf
    • https://cdn-cms.f-static.net/uploads/4417024/normal_5f9be7fc152c3.pdf
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/fovubukoduved-mekur-vasazilivapuxok-bavukatajimoje.pdf
    • https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/bopej.pdf
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/lanesesubixata-ruxisodufuset-tofuwaxe-ruteko.pdf
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f8a699f0e1bc.pdf
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/jetoge-jarazesizu-zekivep.pdf
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f92edb426d91.pdf
    • https://lasaveba.weebly.com/uploads/1/3/4/4/134488520/wufijawumo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mokuwanibof/allen_bradley_hmi_programming.pdf
    • https://cdn.shopify.com/s/files/1/0502/3822/6616/files/14590458151.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_off000085eb.bin
07af35ed11b591c1c18723c2a0b13977524737ed986a0234186057139bbce680
pdf-font-stream PDF embedded font (sfnt) at offset 0x85EB 5452 bytes
font_01_sfnt_off00009885.bin
53def8d855d1ad27ef1e746cfe95c5ab4c6fdec3c7c3ba0f9523dedf5468db1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9885 10832 bytes