Malicious PDF — malware analysis report

Static analysis result for SHA-256 8491978522b9d2cd…

MALICIOUS

PDF

38.3 KB Created: 2020-08-30 02:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d05a20ce647a2f0669f78046e3565627 SHA-1: d5edf08fcd7523afe6c96dafd6a6a359344e7ef1 SHA-256: 8491978522b9d2cdf2f2b6936d5e1fe6e653ffa79442662e81600e0005bfbf52
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, specifically 'ttraff.cc', which is designed to lure users with search-engine-optimized content. The document body, though heavily obfuscated, contains the same URL and a related Shopify URL, suggesting a phishing or scam attempt. The ML classifier also strongly indicated 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/wix?keyword=warframe+staff+weapons
    • https://cdn.shopify.com/s/files/1/0431/7023/4519/files/vezuzuteguk.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4487/files/cds_2019_form_apply.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/70441959953.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/10th_class_maths_all_formulas_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/54134245587.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6605/files/xobomezawudumenuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2984/files/82398273027.pdf
    • https://cdn.shopify.com/s/files/1/0429/7801/7443/files/vojowezopezaro.pdf
    • https://cdn.shopify.com/s/files/1/0433/7208/5406/files/74686382545.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/75710000857.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/84618998329.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/gorepilolowutugowofumofi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/cch_ct.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a48.bin
02b47be7d87a0d61e5236934629fd4daf1ccf726e004fac550c73225b419c37b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A48 3800 bytes
font_01_sfnt_off000057d5.bin
3208ea70d5e02925ddbe6b4dade623bf4d76f76a85a1bbf701fbe811432991a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x57D5 5120 bytes
font_02_sfnt_off00006942.bin
3486ee0755744cc4375f098a18b0ecc42f1e4034571327fafb7a66e9df36cedb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6942 10304 bytes