Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c894c33eab338a9…

MALICIOUS

PDF

40.7 KB Created: 2020-09-18 08:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77fa38bea723196c1d3e3e1f4a09b76f SHA-1: 484e60428df0d63e424dce590051a7dd6205363a SHA-256: 9c894c33eab338a9efa1473794026315c6cb56658a4edb104a1d78ff82a8e0c1
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ttraff.me', indicating a malicious redirector. The PDF_SEO_LINK_FARM heuristic further supports this by identifying a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The document body, though heavily obfuscated, contains the same URLs found in the heuristics, reinforcing the attack pattern.

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.me/wix?keyword=girlfriends+guide+to+divorce+season+1+episode+10+music
    • http://tiruxujub.aspnet-tt.com/uploads/1/3/1/6/131636745/fuzinotulawef-jamadetaxolit.pdf
    • http://wonexuta.gsportz.com/uploads/1/3/0/9/130969915/1914516.pdf
    • http://kabegafod.northvicgps.com/uploads/1/3/0/7/130740117/nuwuz.pdf
    • http://files.thethirtyfirst.org/uploads/1/3/0/8/130814157/gokij.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/80383957678.pdf
    • https://cdn.shopify.com/s/files/1/0431/4696/9237/files/moxadik.pdf
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/jacqueline_newell_picture.pdf
    • https://cdn.shopify.com/s/files/1/0433/5848/6678/files/xiverobasipumuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2684/8661/files/golang_decode_application_x-_www-_form-_urlencoded.pdf
    • https://9ec85a6a-debb-4a2b-8612-ddd7766ae1a6.filesusr.com/ugd/e1d12c_d90c4753ba02425f81d23152ba1eaf79.pdf?index=true
    • https://8ac3a5c2-9ba3-4f10-9afd-7b392ba51d13.filesusr.com/ugd/b6aaa0_027a2371c1e64b6eb3ba1ce5bc3ad61d.pdf?index=true
    • https://0b818632-f141-4c3c-b084-402a0f0c09db.filesusr.com/ugd/e00bd3_8f8aadbb60b94619bc1da209f9264f32.pdf?index=true
    • https://89d9d0c8-499d-434f-a5ae-1ab5c4c722ed.filesusr.com/ugd/e3ff21_75be04f8f02c4e1f953a68dcc6450fb8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/23096749458.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/91867404352.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_off000059c5.bin
b4217003a15142c971c344a00966f31a4c77ed0eb5b2cae21c401af1e6ce3337
pdf-font-stream PDF embedded font (sfnt) at offset 0x59C5 5760 bytes
font_01_sfnt_off00006d5f.bin
6673a136b184819e5260a0b4c5335441814dcaf2a9a27356f6be6e833d3f97f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5F 12480 bytes