Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f5687d622d863a…

MALICIOUS

PDF

42.8 KB Created: 2020-07-28 04:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e243413e05021b0bb11350a1f111671 SHA-1: 3a00e59e1c05322f342b3049c1679336f93aedfb SHA-256: b0f5687d622d863ad4917602eb49a3a2d8c9b68bef1585952f867855f8395e4f
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to running Linux on Android, suggesting a social engineering pretext. The presence of numerous links to Shopify-hosted PDFs, some of which are benign, indicates a potential link farm or SEO poisoning tactic to increase visibility.

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/pify?keyword=android+run+linux+vm
    • http://files.susankraftconsulting.com/uploads/1/3/1/6/131606128/xekefuna-zawejanuropije-gevukarowuxiteg-tasosusafuwelaj.pdf
    • http://files.kittlesmusicstore.com/uploads/1/3/1/4/131406785/7890823.pdf
    • http://files.katherinemunster.com/uploads/1/3/1/6/131636737/d98cc.pdf
    • http://files.susankraftconsulting.com/uploads/1/3/1/6/131606128/xekefuna-zawejanuropije-gevukarowuxiteg-tasosusafuw
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/38665415944.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/wigilemu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/winijosita.pdf
    • https://cdn.shopify.com/s/files/1/0431/0656/6306/files/70718731194.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/64292536425.pdf
    • https://cdn.shopify.com/s/files/1/0435/4480/5525/files/3450842976.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/pixubagefoluralir.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/fisimuxopozewa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/71658185591.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/95686900690.pdf
    • https://cdn.shopify.com/s/files/1/0440/7230/4790/files/falazifur.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_off00006e61.bin
7d57cec7d1f785d81116bd42d023aee3476dab3158e3d0064b56e6d60310ffcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 4384 bytes
font_01_sfnt_off00007d0b.bin
970e020c7bbf4a31e4d8e1ac9cd16a150f0b6a77bea753757ba269e104577497
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0B 9844 bytes