Malicious PDF — malware analysis report

Static analysis result for SHA-256 155a71b93529ad6a…

MALICIOUS

PDF

40.4 KB Created: 2020-09-09 08:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: faeff12c1898bb3d25f391e3195611f1 SHA-1: 70e78928d0e777a518599bc41e97cabe194941a7 SHA-256: 155a71b93529ad6a0ba549ddc8665bda50e5d3d522f76d32b8ed133806ab9ea8
174 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, disguised as a document signing lure. The embedded URL, 'https://ttraff.com/wix?keyword=adobe+reader+xi++softonic', is designed to appear legitimate but leads to potentially harmful content. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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=adobe+reader+xi++softonic In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/e56fe2_bb8d46ae9f704cf6b4cba9e7aacc7b77.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2c76f4_bd52f37ed6c0457eada5627b12e92fce.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e6092c_c5b5f772180a495c8c3861b2918afccc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/87ad98_158b82008ba64b86aef0fcf933f245ca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/vizat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3655/7736/files/39709597114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0855/6182/files/8154284132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/97889264007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/suzagali.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ea78e0_c2e39e42f9d94e429708f5708eb27d09.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7a359d_759a29a3f76e465ba28d36c1b846b510.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/37428b_0838b9ec72894c2eb5b788eb3d34d415.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B4 5180 bytes
SHA-256: a8a3a144a3b801192b18237481080c4ce4e00904a7fcd74de9e934e269ef40a0
font_01_sfnt_off00007268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7268 10136 bytes
SHA-256: 73d6f5559a5603d3a30a46ac0d6ca6f0570a363f94a45316ffbe448209f34c06

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