Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4c3e389f44e3ac…

MALICIOUS

PDF

39.1 KB Created: 2020-08-01 11:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 390b7a8b0d38b07eaf193b20ade644bb SHA-1: eb2316d7ea684f404f6556e904de5660e8684852 SHA-256: 2e4c3e389f44e3ac8dcbcc7bfba559f3a586190dcd18fcd1dc2c6352d5b9d503
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.com/pify?keyword=scriptures+on+business'. The document body, though heavily obfuscated, contains this same URL, reinforcing the malicious intent to redirect users. No scripts were extracted from this sample.

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.com/pify?keyword=scriptures+on+business
    • http://files.wowthebrain.org/uploads/1/3/1/3/131384335/9320818.pdf
    • http://files.george.work/uploads/1/3/1/3/131379980/3511025.pdf
    • http://files.grantsboronc.com/uploads/1/3/0/7/130776826/bfbdb3a2bd855.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/95044293653.pdf
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/repenagemus.pdf
    • https://cdn.shopify.com/s/files/1/0438/5888/6806/files/53181747449.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/59295301565.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/vokapodepapofax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/41063253304.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/56053012379.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/jifibidosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kerikelamizefebimu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/61823718516.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_off00005de3.bin
ca11e7c6e0142a29de1f1f1ca9abe6b9822e6f4d0c95e5ec6d014aaef5b602f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE3 4928 bytes
font_01_sfnt_off00006eaf.bin
d05b1f096d957244756f0fd64f2e0ff01c5ae64c359485b0dadfe9c57da4ef8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAF 9800 bytes