Malicious PDF — malware analysis report

Static analysis result for SHA-256 f982ec0a2687da2f…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 01:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f558430f7facbc3954d20d67f7f6bd43 SHA-1: a2fbad5f409b6636058fa339ddd2ab9e62cca702 SHA-256: f982ec0a2687da2f3d033394d5bf3e1923008eaef25f780ac1b7286842e42084
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link farm with numerous external links, including one pointing to a known malicious redirector at 'ttraff.ru'. This suggests the document is designed to lure users to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector URL is a high-priority indicator.

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://ttraff.ru/pify?keyword=deloitte+global+impact+report
    • http://files.westtexasguitarfestival.com/uploads/1/3/1/3/131398059/figotokolo.pdf
    • http://fivuvam.msgagemusic.com/uploads/1/3/2/6/132681482/jixusi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0445/9456/1188/files/xasetulemimafosiziludigom.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/nasoviporegimopidolibef.pdf
    • https://cdn.shopify.com/s/files/1/0429/8031/1203/files/fafuwobelowaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/rapokubofezofujuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/0520/4888/files/3000_academic_word_list.pdf
    • https://cdn.shopify.com/s/files/1/0448/9995/8939/files/betty_crocker_recipe_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/gozipuxutezulikusanul.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/samsung_sm-_t800_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1191/4403/files/horn_antenna.pdf
    • https://cdn.shopify.com/s/files/1/0431/3805/6354/files/15084021691.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ef3.bin
48fa842e2737f04e6220dc4132a121950793ff562f1e0f4a9bec69a124400da3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF3 5216 bytes
font_01_sfnt_off000070a2.bin
30045ab25f5d30b36b29045302547b057b2037d654ef5497711aafc41e785d7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x70A2 10888 bytes