Malicious PDF — malware analysis report

Static analysis result for SHA-256 288d982e629a1b9d…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 11:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e775480cfc66e3eee3a3600418d6188b SHA-1: 7efcf4c36032af61edebd8934b058545248565fb SHA-256: 288d982e629a1b9d62e1e9d4c3311795209b533f8b0458199da79d6d5cce2a69
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. This indicates a phishing or redirection attack. The ML classifier strongly supports the malicious verdict.

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=programming+merit+badge+pamphlet
    • https://static.usrfiles.c
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/tetew.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/chacha_chaudhary.pdf
    • https://cdn.shopify.com/s/files/1/0438/1173/3664/files/medical_terminology_quiz_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavoriduxosijalas.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/xulagetigugawemu.pdf
    • https://static.usrfiles.com/ugd/5b9a87_aa14b135548d4d1da001d7350b16b601.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbfd47f34fde4b1197f93e339d071f65.pdf
    • https://static.usrfiles.com/ugd/0a0016_a51a559574e64237b858be724c2a10db.pdf
    • https://static.usrfiles.com/ugd/b8c837_41934b2beee5442ca25610b90fd6c930.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/nutakosijajizuwolotopaso.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6558/files/front_end_engineering_design_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/juxivexubusipaxewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/yugioh_legacy_of_the_duelist_free_do.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_off000069b2.bin
6c23924a14af9a1e8345053e7a4628e25349d26315da16ae5bc6092fdddc2309
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B2 5336 bytes
font_01_sfnt_off00007b9e.bin
cc5c0adec5a27c816c6d087abc0d8433a3efdf13e7fb540ea3a897bd2e9d6642
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9E 10808 bytes