Malicious PDF — malware analysis report

Static analysis result for SHA-256 484bb233529f803b…

MALICIOUS

PDF

64.2 KB Created: 2020-08-04 02:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f981cbef8a7a5249ee75525ef5b786a0 SHA-1: b48890b22f992b53b7b01b0e51fdeb9d9605fd02 SHA-256: 484bb233529f803b484b57d5b9576ca32f75d1dda6a521a57ad0d68103a76db0
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to `https://ttraff.cc/pify?keyword=band+of+brothers+book+pdf+free`. This suggests a social engineering lure, likely to trick users into downloading further malware or visiting phishing pages. The ML classifier also strongly indicated maliciousness.

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=band+of+brothers+book+pdf+free
    • http://files.seasoulself.com/uploads/1/3/1/4/131438245/afb14246.pdf
    • http://files.ultimatesfastpitch.com/uploads/1/3/2/6/132696351/pomokilito_pafumul_tezotozodufutij_fatorinokogu.pdf
    • http://gidafab.cccoalitionac.org/uploads/1/3/1/4/131438464/gumotenapaz-barujagin-madulej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mefawubizujoki.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/axial_flow_air_compressor.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/38510241962.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/pegepivifanakufewukexe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/61774600309.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/74117793344.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/rixolebuxaxavoniwunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0467/4727/files/webota.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/guguropaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/80044692268.pdf
    • https://cdn.shopify.com/s/files/1/0435/7337/9231/files/50748234721.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_off0000be98.bin
3462f6ea6b0f6bf6db9a883bbf2d89d824e1f1d1415770cdd133f0b57804d6dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE98 5348 bytes
font_01_sfnt_off0000d0bb.bin
71d044e688bc7b1b20c8a65919268a343ceaf6dc00861e4932594994a110d7ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BB 10460 bytes