Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c8e1c952224786…

MALICIOUS

PDF

47.7 KB Created: 2020-09-04 18:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41302ab695cdbb3221964cee1f64849c SHA-1: 0dc2ca1d9ae350377c5004504151ec3127dca678 SHA-256: 61c8e1c952224786fc5bad7ca0abaf0e20e3dc79ef6a0935c751e800d78ec734
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'sb game hacker android' and includes the malicious URL. The presence of numerous external PDF links, many pointing to benign Shopify URLs, suggests a link farm or SEO manipulation tactic to obscure the primary malicious link.

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.club/wix?keyword=sb+game+hacker+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/6052/7003/files/joining_report_for_gazetted_teacher.pdf
    • https://cdn.shopify.com/s/files/1/0435/3599/0943/files/14046948104.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/damuwitulopujavixilojo.pdf
    • https://static.usrfiles.com/ugd/b8c837_df087bd10e5f419e8aa4f439edae7421.pdf
    • https://static.usrfiles.com/ugd/53cfc7_762abe3372e04aebb4c4495a09695f54.pdf
    • https://static.usrfiles.com/ugd/3e7897_04fd295ccc2c49c8b61e1e3dd6232a69.pdf
    • https://static.usrfiles.com/ugd/d94ae5_922bee24112b48ea933503d4c6b87af9.pdf
    • https://static.usrfiles.com/ugd/b8c837_63aad2c1a8234b43a7d25d63c193b7e7.pdf
    • https://static.usrfiles.com/ugd/485053_4688a4251d1b45b5a63d561f9968e5db.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fd0bdb4ea354122ab036d196f5a9c5b.pdf
    • https://static.usrfiles.com/ugd/41a0b6_667e7f63a66441ada2098f4bb3e90d0c.pdf
    • https://static.usrfiles.com/ugd/3be3a7_13b1aa1b381645f5bbb54606cf2f7bb0.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e10.bin
cf3f4c2e3df2436a673f482b6dcb81c8fa9e9915fe9b9bc56bbd57ec47c55d10
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E10 5448 bytes
font_01_sfnt_off00009072.bin
a7f2d929960a443920a705ac1828cc3bed6804282dbe36b177d306f782d93da2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9072 10032 bytes