Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a6e776b67cb46b…

MALICIOUS

PDF

47.3 KB Created: 2020-07-22 12:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a96cca503e51a88e64ceb756a8591c5b SHA-1: 6c979e3ab4689af42ce6ba860500d48c53db3e0e SHA-256: 87a6e776b67cb46ba197ff2af16cb292222bbcf5fd95ee88a37f5b6b51705d89
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a lure for free downloadable content. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wb?keyword=papercraft%20gundam%20free%20download%20pdf
    • http://files.pmgrouphk.com/uploads/1/3/0/7/130775950/viwulikelekososipaze.pdf
    • http://files.jennifertitone.com/uploads/1/3/0/7/130775261/binafobu.pdf
    • http://files.getsumcharters.com/uploads/1/3/1/4/131438211/b2bf429a7f7.pdf
    • http://files.jhepburnauthor.com/uploads/1/3/1/4/131437457/c8d3f26.pdf
    • http://files.joekreszfitness.com/uploads/1/3/1/6/131637021/984c478f6.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/xoxulop.pdf
    • https://cdn.shopify.com/s/files/1/0432/1188/2653/files/lelare.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/55286078515.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/gazatavumodotu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/nopene.pdf
    • https://wagenox.files.wordpress.com/2020/06/12382205678.pdf
    • https://duvuzeso.files.wordpress.com/2020/07/suwilo.pdf
    • https://wuzuziwe.files.wordpress.com/2020/07/35895167322.pdf
    • https://jivituxevum.files.wordpress.com/2020/07/60205746832.pdf
    • https://xidiseso.files.wordpress.com/2020/07/50133286883.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0694/files/zazenazisinunokegixiji.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/fisom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/56037798777.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/10615918889.pdf
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/digap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5695/4518/files/gijojovilomiruzamefix.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/mulimiwawa.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_off00007512.bin
a6c43a7455c8853451b995524156c3d2bdda1b05ee8e3cf69c8296c09e48393f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7512 5224 bytes
font_01_sfnt_off000086d0.bin
ea03ab5236f247521162d7a605e57bf126a759e95975d033ea269f96f93c6328
pdf-font-stream PDF embedded font (sfnt) at offset 0x86D0 12856 bytes