Malicious PDF — malware analysis report

Static analysis result for SHA-256 40861e16fee3ebf3…

MALICIOUS

PDF

80.5 KB Created: 2020-08-24 08:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c81c7b29fae1c913cbad31a8765ba1f0 SHA-1: 17b8b60c33887558631f17c5a53d4423e74b9b47 SHA-256: 40861e16fee3ebf3afba9928c784431d9f3ba5a23c192231681a6d4a34195258
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on 'cdn.shopify.com'. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring users to malicious sites via embedded links.

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=hangaroo+answers+events
    • http://sanudisil.drydesign.co.uk/uploads/1/3/1/3/131383664/lofarabujozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/13640468409.pdf
    • https://cdn.shopify.com/s/files/1/0431/7128/3098/files/fivenibafezapukonaloxim.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/26006452621.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6471/files/93973564416.pdf
    • https://cdn.shopify.com/s/files/1/0452/6351/9906/files/pixezokuvinakiju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4155504299.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0854/files/lerovojunokef.pdf
    • https://cdn.shopify.com/s/files/1/0437/6566/1845/files/19362671172.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/62117958757.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/73439392600.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_off0000ea6b.bin
b28b9f3193f36c770c8d64c1ebcd3454886d5ec9819ece5f75a6dcda2b2245e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6B 4672 bytes
font_01_sfnt_off0000fa60.bin
429ab27869b52edca1ce0a119653277c08c2b1996b538b68782aaab7fcd80a4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 13812 bytes
font_02_sfnt_off0001256a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x1256A 4324 bytes