Malicious PDF — malware analysis report

Static analysis result for SHA-256 1677c60855f94403…

MALICIOUS

PDF

41.2 KB Created: 2020-09-10 02:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2295f336495653dee3eb0c99ab027664 SHA-1: e7a81b412811a068d6626591e3a74012df3fcebc SHA-256: 1677c60855f94403362685132992b61326c2fbbb949fc68bd605b0acb8247586
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.link'. The document body, though heavily obfuscated, contains text related to 'Kochi tourism guide' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links further indicates a link farm used for SEO poisoning or distributing malicious content.

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.link/wix?keyword=kochi+tourism+guide
    • http://files.michiganrealtysolutions.com/uploads/1/3/1/4/131406202/b5be3e.pdf
    • http://files.tilliesnevada.com/uploads/1/3/1/3/131379612/xapixivote-pipugu-neruxesivalu-wifuf.pdf
    • http://files.innerheartpathways.com/uploads/1/3/1/4/131408970/dc22471b539454.pdf
    • http://namipire.powersbaptistchurch.org/uploads/1/3/0/7/130776021/6251508.pdf
    • http://gariganij.antoinetteducheinlagrone.com/uploads/1/3/0/7/130775388/8417901.pdf
    • http://dujiku.socialplannerevents.com/uploads/1/3/2/3/132303382/kifilazuser.pdf
    • http://files.hpotx.org/uploads/1/3/0/8/130874620/gumixamodifopol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/769f78_7babb92367cf4339b6a6bcfa84823cbb.pdf
    • https://static.usrfiles.com/ugd/defd8a_3b39fd2483044bb5bfc40116e2e38628.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_0675c4caa87343c28348d05d4afc14b3.pdf
    • https://static.usrfiles.com/ugd/0bcf16_7235aff3847c498daf3273e04cde53d0.pdf
    • https://static.usrfiles.com/ugd/41f880_7f90cf6083ac4ff2b71e66d89c39e504.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2984/files/angularjs_6_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/23971213795.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/anamnesis_example.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_off00006533.bin
3c60cb06a0d4fcebf607e134511e94f2bef65b3cd8789b7288bafd3fc093a23d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6533 5080 bytes
font_01_sfnt_off00007652.bin
a4972d3c7c888275e7a715e79bd921cea801716cf3219db740804a7c10bc1b84
pdf-font-stream PDF embedded font (sfnt) at offset 0x7652 9832 bytes