Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae096db66a2e2773…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 03:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9030c537ced314cfdb148907d9adeec SHA-1: d86e0cbacb0c5b8a6020f45a967d2235497d032a SHA-256: ae096db66a2e277308d326e050c06fa9450f295aed1bf89a9ee68522e6db41d0
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at `ttraff.ru`. The heuristic `PDF_SEO_LINK_FARM` indicates a large number of links, many hosted on `cdn.shopify.com`, suggesting an attempt to create a link farm for SEO manipulation or to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious sites via deceptive links within the document.

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/pify?keyword=data+analysis+test+questions+and+answers+pdf
    • http://koxexi.jensencars.org/uploads/1/3/1/6/131606027/eecb7c0ce8d.pdf
    • http://files.cold-war-racers.com/uploads/1/3/1/8/131856129/xitakova_zagovapizafole_tajaropiludez_pezojarisovoku.pdf
    • http://files.slowfoodcaterers.com/uploads/1/3/0/8/130815311/7e0a6cb51554.pdf
    • http://files.hrv4training.com/uploads/1/3/1/4/131437601/depigazudan-doruxasasalimig-kojatimifusaj-nesilezuvotobe.pdf
    • http://files.canadiandoveassociation.com/uploads/1/3/1/1/131164081/2480169.pdf
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/baermann_clarinet_method.pdf
    • https://cdn.shopify.com/s/files/1/0433/9354/8444/files/38297359095.pdf
    • https://cdn.shopify.com/s/files/1/0428/4429/1228/files/51435495451.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/96776359437.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8215/files/83883511765.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/chad_yes_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1609/files/40872024726.pdf
    • https://cdn.shopify.com/s/files/1/0448/7118/8642/files/bandolerismo_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/96445942011.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/fudovagutone.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/5358529738.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/xevasonoxoguw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/11514724169.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/59072774204.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_off00006bd4.bin
7649ccba91f89a210e9ac4dd900829243c37a1df098312a4545658ddb9f433f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD4 5356 bytes
font_01_sfnt_off00007e2f.bin
7671ec323cc50ce244b805d272f633ffdc8a915ba90eb80936cd40dea67797e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2F 10228 bytes