Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef6ff98a84296e4…

MALICIOUS

PDF

94.1 KB Created: 2020-08-03 19:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5107e2594f7a0ce4af2f5264ef4de85 SHA-1: cc1baaee3312249d51659bf974ea900b7e26691b SHA-256: 1ef6ff98a84296e463747188e18768838156996695aa15432b34ee80b2e768a9
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a link farm strategy, with many embedded URLs pointing to various domains, including the primary malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains text related to 'Warhammer fantasy lizardmen army book pdf' and the malicious URL, suggesting a lure to download a fake PDF.

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=warhammer+fantasy+lizardmen+army+book+pdf
    • http://files.minilivestock.com/uploads/1/3/2/7/132740415/38a223c.pdf
    • http://files.cubabarbers.com/uploads/1/3/1/4/131453555/7cab8e9f2dea.pdf
    • http://files.sheroamswild.com/uploads/1/3/1/4/131438389/4677316.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4533/files/jusuzuwew.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/wibejadudag.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/muzopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0528/files/rovovamodolesasatol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/74502403444.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/luvutalanopijomakel.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/98848029112.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0904/files/87221929311.pdf
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/bulovufosukara.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_off000133df.bin
c1554a73745a24c06eef6cfeb0903aac3f4062fc11fe2f1b61e3fa55555f19e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x133DF 5648 bytes
font_01_sfnt_off00014703.bin
c0d8010d9428d67e7a6ba6e4341c144f99f39e369972d781f4e5ca89b80cd5d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14703 10440 bytes