Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9cfaaa94b455c2…

MALICIOUS

PDF

44.5 KB Created: 2020-08-03 06:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfa1aa416070bb934cd387a2126b1089 SHA-1: c185fa38166de003f49caa53a26454570b23f108 SHA-256: ea9cfaaa94b455c20a832b311bafdd5026aeeac32fd61d23f253aec3fa9cfaa1
152 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to distribute malicious content or conduct phishing. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=lowes+eagle+pass
    • http://files.instpp.ca/uploads/1/3/1/4/131411762/gudabobowatakugexu.pdf
    • http://files.arc-hcs.com/uploads/1/3/1/4/131437249/kimomurakod_zinus_vufijijaze.pdf
    • http://files.simplydivinesuds.com/uploads/1/3/1/4/131407812/23f3d849.pdf
    • http://files.swlamasternaturalists.org/uploads/1/3/0/7/130775594/pusijimafuguvum_kawep.pdf
    • http://files.stokemodelclub.co.uk/uploads/1/3/1/3/131383602/ketaliputejuxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7549/files/xitex.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/38902666429.pdf
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/20541013777.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9204741539.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/58523860386.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/88301436351.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/teridogafuzavinuwavegifik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdf
    • https://cdn.shopify.com/s/files/1/0431/2694/7989/files/gezif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/28839276654.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_off00006e95.bin
877e73e6526808d8128f0560bfcee6d84a6be8b60e37cfa0f3295da16c1e8321
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E95 4924 bytes
font_01_sfnt_off00007f8a.bin
16335e78595b445c205af61ba833db8454b4406f26220fe629edbfa10ffcf198
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8A 11720 bytes