Malicious PDF — malware analysis report

Static analysis result for SHA-256 6558d22fefaa481f…

MALICIOUS

PDF

40.5 KB Created: 2020-08-15 03:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b3d2e9c58c8d5b37308caa4901530a0 SHA-1: 3986d5ade70fc84dbaf41d987838e29d2f7d0210 SHA-256: 6558d22fefaa481fd8449e2164d31af5e0831eb643512c1bfdc3a1c64d56284b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically `https://ttraff.com/pify?keyword=e+news+reporter`. It also features a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs points towards a phishing or redirection attack.

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=e+news+reporter
    • http://karuru.renovatiowellness.com/uploads/1/3/0/8/130874410/moruji.pdf
    • http://files.amarillo-massage.com/uploads/1/3/0/7/130776408/pulatipam-dubax.pdf
    • http://files.lindaslineup.com/uploads/1/3/1/4/131453432/8279286.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/vabomiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/mosonodazurijujim.pdf
    • https://cdn.shopify.com/s/files/1/0428/7466/7164/files/powivazofipor.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/apollo_munich_health_wallet_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/lakezamoferetugivapuna.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/32903402210.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/wugokegobozeja.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/noakhali_vs_barisal_natok.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006323.bin
a91c6efad35531436e7ab1b7c7272703122d219dfadc63962685d79b06c3f138
pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 4620 bytes
font_01_sfnt_off000072ff.bin
94714dbaebdc75e62644b7b5b89ab352d29c9bd20a5ecbe0a50e81af78afb5f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x72FF 10172 bytes