Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b049fb5f50730a…

MALICIOUS

PDF

52.1 KB Created: 2020-08-30 23:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b917b137797a319909cc1fdca4a4b474 SHA-1: 06b2322ac1a4d8b4f5c0b1fa67fc56dbf50af9ba SHA-256: 11b049fb5f50730a79f7bffb075421f1b16eea7b9fe35d09fe7b167860d32db0
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results, directing users to a malicious redirector at 'ttraff.cc'. This tactic is often used to obscure the final malicious destination and bypass initial security checks. The presence of numerous embedded links, many pointing to benign Shopify URLs, suggests an attempt to create a deceptive SEO-optimized document.

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/wix?keyword=dragon+ball+z+budokai+tenkaichi+3+cheats+wii
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/15167537236.pdf
    • https://cdn.shopify.com/s/files/1/0439/7717/9294/files/comptia_cysa_study_guide_exam_cs0-_001.pdf
    • https://cdn.shopify.com/s/files/1/0458/3211/0243/files/49164175272.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/bwv_1004_gigue_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5762/files/nofigomosexebonovep.pdf
    • https://cdn.shopify.com/s/files/1/0436/4363/3822/files/fafakijosevigubakonix.pdf
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/63577686912.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/soduluba.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/4916605014.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/19413821778.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/86793123751.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32150460784.pdf
    • https://static.usrfiles.com/ugd/b8c837_5714bae28ead4cc998467ce501fe75ef.pdf
    • https://static.usrfiles.com/ugd/5de1df_a808c78dab774c72be89907e5c880c00.pdf
    • https://static.usrfiles.com/ugd/b8c837_b110cfcaee064105be01a87234f9ce4e.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_off00007bdf.bin
5eb2eaeb92e6f9d34ca3302c651408aa7ed5ab1a43c4eb877960d0f8e7eb8fcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDF 5708 bytes
font_01_sfnt_off00008f60.bin
550e341b7c0c3bbf8d7b26fff9993a843f981a799ff66e1bff484eb30b6d0ac8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F60 16876 bytes