Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e91daa590e6f57…

MALICIOUS

PDF

38.7 KB Created: 2020-08-31 08:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 385ce657ae2287d3b9fda707bb41178f SHA-1: 1220c21bc7be012cad6420517ed7e96261832ec2 SHA-256: d3e91daa590e6f572430928bcd39e46e3eaf010c88eabe04ccf2ae414be47c49
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'The Witcher 3'. The document body, though heavily corrupted, contains fragments of the lure text and the malicious URL. The PDF was flagged by a machine learning model and heuristics for containing a malicious redirector and a link farm, indicating a phishing or scam attempt.

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=the+witcher+3+xbox+download
    • https://static.usrfiles.com/ugd/97493d_bd2ae94c1df34ac28bca7dfb67e14d5f.pdf
    • https://static.usrfiles.com/ugd/d01287_64f8a7254689466f965f31484b8f2c24.pdf
    • https://static.usrfiles.com/ugd/b8c837_79a4e57205f04ba58e0393a2ba477be0.pdf
    • https://static.usrfiles.com/ugd/b56239_cc553feb04cb45dd902d96569d618424.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2b7ad57c16844b7aa4a5a192e0c8564.pdf
    • https://cdn.shopify.com/s/files/1/0436/0005/2387/files/behavioral_interview_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/9353/9482/files/61541515687.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/32778941555.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/the_cask_of_amontillado_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65529241957.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/sep_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0428/5916/7900/files/lupusirinuwajevik.pdf
    • https://static.usrfiles.com/ugd/913720_2b12e130597747348c407be70a9e9b30.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a6994f04ad4469d8926b2dddda81325.pdf
    • https://static.usrfiles.com/ugd/0049ca_18a55c95bce54568a362da7a1a1720a9.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_off000059b7.bin
90be2f22d38c61068310a197ace0cd11f5f8d2570d34d0007ea2c1033634e2e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x59B7 5264 bytes
font_01_sfnt_off00006ba4.bin
726878b13c197151d83fc0177334f6e92d897754625451a3270c6a48ba6f9d63
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA4 10152 bytes