Malicious PDF — malware analysis report

Static analysis result for SHA-256 9752da9192f67e46…

MALICIOUS

PDF

59.3 KB Created: 2020-08-22 10:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dec1d85e82e5cefd802cd79201df59a5 SHA-1: 6ffb6ff5b9f29adba41b03aa7e6fad3446b5501d SHA-256: 9752da9192f67e460012c8d01ca5d2de321262ccd85f88206c427b8a34bfbde8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as an 'Angular material formbuilder example'. The PDF also hosts a large number of external links, many pointing to Shopify, likely as part of an SEO link farm to improve search engine ranking for malicious content. The ML classifier strongly indicates maliciousness.

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/pify?keyword=angular+material+formbuilder+example
    • http://lunari.likesgoodbookslifecoaching.com/uploads/1/3/0/7/130775850/6636981.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/wedgewood_stove_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1079/files/19806911817.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wirokole.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/46544296622.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/paxojixusigalifax.pdf
    • https://cdn.shopify.com/s/files/1/0440/6588/2277/files/27481020055.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/weight_training_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0439/0646/5947/files/82711333540.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/bovolokiwukobodozov.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/66446583460.pdf
    • https://cdn.shopify.com/s/files/1/0435/4437/9546/files/hybrid_rudiments.pdf
    • https://cdn.shopify.com/s/files/1/0447/9139/8561/files/mcquarrie_general_chemistry_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/66762464687.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/99886963725.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_off00009cee.bin
f1d7b56204a69c5c25990e7a2774e7be39d37f780d92c5fc4ee5bf18eee8dd81
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CEE 5380 bytes
font_01_sfnt_off0000af23.bin
3c06f965bcee3a7c57de1422092951399fc19894fe29a7d81d9de147ea8706c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF23 15496 bytes