Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03fc626d2da0b69…

MALICIOUS

PDF

44.7 KB Created: 2020-08-12 03:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f37bf509f89d7eacfed0e137e466d3 SHA-1: b5d162cba8c336e1f7cf3451a92d2502db9da7d1 SHA-256: b03fc626d2da0b6908e467eef5d8f44d4c74888bccd716153b403bbdd3aa2f27
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a primary link to a known malicious redirector at `ttraff.com`. The document body, though heavily corrupted, contains the same URL, suggesting it is the intended lure. The presence of numerous other PDF links hosted on Shopify domains indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/wb?keyword=solid%20waste%20management%20research%20paper%20pdf
    • http://files.childenrichmentcenter.org/uploads/1/3/0/7/130739404/2121209.pdf
    • http://files.snokingmetals.com/uploads/1/3/1/8/131856700/394766.pdf
    • http://files.ktsewingstudios.com/uploads/1/3/0/7/130776542/vepirosajuxa_ginixavufinaxu_bunigivisipam_nivilijofulaj.pdf
    • http://xirebowif.finalfinishdetailing.com/uploads/1/3/1/4/131438464/dcf7f469785.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/68444239976.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/woxavaloluvuvubotux.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/77636714446.pdf
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/30628862076.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/95397191987.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/70271959660.pdf
    • https://cdn.shopify.com/s/files/1/0432/5192/5155/files/45945182220.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/49950069249.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/39544904186.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/durap.pdf
    • https://cdn.shopify.com/s/files/1/0435/6400/7583/files/bratislava_public_transport_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/korozubifosuwanetapuwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1184/0927/files/craftsman_42_riding_mower.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_off00006d3d.bin
e643dfe75edd4e170b973a96ff78ac59032cf9f54b8c6d8c21b39cb3c2c88d28
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3D 5764 bytes
font_01_sfnt_off000080c9.bin
6cc1e2292d0951f7da42d17520c950e467615579fa2e20835a0cb0fd21893665
pdf-font-stream PDF embedded font (sfnt) at offset 0x80C9 10972 bytes