Malicious PDF — malware analysis report

Static analysis result for SHA-256 18fb58885c977b6f…

MALICIOUS

PDF

45.0 KB Created: 2020-08-31 09:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b60f83f86a9d27ac74749f87811a4f1 SHA-1: 89bb949799495f01bde6bd129bdd390401921b2c SHA-256: 18fb58885c977b6f16874a6da9a6c12eb9cee014533fb4873800d9649659a323
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to host or redirect to further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to distribute 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.com/wix?keyword=kritika+online+leveling+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/20d83a_271ba1b9edea4d2385c6a0ba9c2a8799.pdf
    • https://static.usrfiles.com/ugd/34e21e_c0e97780304840c28e529cddd9316495.pdf
    • https://static.usrfiles.com/ugd/b8c837_f45e0c67bf6d4144944e76151606cdb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d431b805142644bca6967532d48adb4b.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/zejatenefapivutobuval.pdf
    • https://cdn.shopify.com/s/files/1/0435/2635/7152/files/wozolifenufujomamafug.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/79850149922.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8776/files/9583257488.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0503/files/25357075245.pdf
    • https://cdn.shopify.com/s/files/1/0430/3493/5447/files/livovarokoje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064cd.bin
d43753505d32caaed36de35ca391009780e6370cce115c5256009e0f6737ca98
pdf-font-stream PDF embedded font (sfnt) at offset 0x64CD 4792 bytes
font_01_sfnt_off00007524.bin
4404fed44f26ae2009a7f065c422c311be5d370eb54b7edb257c9c6c8a2c33dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7524 10444 bytes
font_02_sfnt_off000098d7.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x98D7 4324 bytes