Malicious PDF — malware analysis report

Static analysis result for SHA-256 565a605334928d0b…

MALICIOUS

PDF

38.6 KB Created: 2020-08-23 16:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27b75eb2ef4bd941ccfe3046504b505d SHA-1: 62a5515f867c56ccbbf0ec6a4486ad7ded313a4b SHA-256: 565a605334928d0bac862fa6faaa0bc31dc372678e5032d4c5642b2f3f05810d
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One critical heuristic indicates a malicious redirector link pointing to 'ttraff.cc'. The ML classifier also strongly flagged this PDF as malicious. The primary purpose appears to be SEO manipulation rather than direct user exploitation, though the redirector poses a risk.

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=geometry+parallel+and+perpendicular+lines+worksheet+answers
    • http://dufoxowa.johnsinclaircustomcalls.com/uploads/1/3/0/7/130739625/6e1f3219a3d9267.pdf
    • http://miwogeb.nextlevelbizgrowth.com/uploads/1/3/1/8/131872096/683bec398.pdf
    • http://files.springspirit.org/uploads/1/3/1/8/131871816/9805401.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/jededapisofasulanerisebik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rapuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/9989/6475/files/zixariwowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/computer_age_statistical_inference_algorithms_evidence_and_data_science.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/hathway_cable_tv_packages_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/59326320810.pdf
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/hansae_co_ltd_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/lubuvijaxefupibofad.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_off00005a2f.bin
100b9d1d7760cbdd24e35156978060cfd2071a94ef98ea24058433d00fdfd934
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2F 5604 bytes
font_01_sfnt_off00006d23.bin
d49160f9f6be6eb79667552f74a7cd9e4a708731d5bee346d506e3fa1437c73a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D23 9452 bytes