Malicious PDF — malware analysis report

Static analysis result for SHA-256 734c9247f7b378a3…

MALICIOUS

PDF

55.3 KB Created: 2020-08-18 14:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d812f784c1a4e06a8effdef044d71205 SHA-1: 631ad014d29b68fefa26537398e7e7780d9ef9f5 SHA-256: 734c9247f7b378a3278ceeca872a8c33f17f4b115d30d4dff5c2c7306b153f92
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Rome total war marius reforms' and includes the malicious URL, suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a potential link farm or SEO manipulation tactic.

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.cc/pify?keyword=rome+total+war+marius+reforms
    • http://teputi.nancyyenshipleymd.com/uploads/1/3/0/9/130969858/xoviniretup.pdf
    • http://files.chartercitytoronto.ca/uploads/1/3/1/4/131437677/32f76199e2d.pdf
    • http://bixexo.monumentvillageoriginal.org/uploads/1/3/1/6/131607600/wadovurelenowa_gemeniwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1672/4386/files/sibemidagenifugi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/contractor_warranty_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3469/files/xigelanomubosidiwawavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/xaraveke.pdf
    • https://cdn.shopify.com/s/files/1/0430/1013/0073/files/dulokanizobakubesipizobu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/kugazuku.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/46328540641.pdf
    • https://cdn.shopify.com/s/files/1/0431/6482/7805/files/watadeperapaxi.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_off00009cee.bin
b6d84c6ebd3d2746ac7a2d156a659a9eea3a6af700ee8613012fc15fba0a02f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CEE 5012 bytes
font_01_sfnt_off0000adf5.bin
ebae2b751d56a2497b59b1f9575346045deacf99a821a3dfaaab8d5318db6a00
pdf-font-stream PDF embedded font (sfnt) at offset 0xADF5 10240 bytes