Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6d5acc36ab3aa5…

MALICIOUS

PDF

48.6 KB Created: 2020-08-03 21:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41f66a70b5779f0da6a18778fecb5e81 SHA-1: 17e8d38740660bbad5e383864d39c679c0a4a3dc SHA-256: 0d6d5acc36ab3aa56bac5838281926fa3011961d97895e4fcec0ae16647287b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link farm and a redirector to malicious infrastructure, disguised as a Metallica tabs PDF. The ML classifier strongly indicates maliciousness. The embedded URL points to a redirector, likely intended to deliver a second-stage payload or phish for credentials.

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=metallica+one+tabs+pdf
    • http://files.iamsmall.net/uploads/1/3/1/4/131437064/8559675.pdf
    • http://files.suburbanmaven.com/uploads/1/3/1/3/131379382/602fdd2d4a2.pdf
    • http://files.stephanietingle.com/uploads/1/3/1/4/131453592/rufadubixu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/82294758430.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2527/files/21408424277.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7918/files/missouri_secretary_of_state_corporations.pdf
    • https://cdn.shopify.com/s/files/1/0437/0422/1846/files/bovowajuvik.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/kewadukal.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/10947008508.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5610/files/dark_web_image_search.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/muwuliwisulikokobevakip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/nigewuvebete.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7911/files/76827975678.pdf
    • https://cdn.shopify.com/s/files/1/0432/8865/8078/files/pibavavow.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/67197764458.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/dumar.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_off0000747e.bin
5953748e44d0f352ee2b65173e076d45f67c6d84f52f71015652035cd4e03403
pdf-font-stream PDF embedded font (sfnt) at offset 0x747E 5200 bytes
font_01_sfnt_off00008649.bin
1e463c1f33908787ea99f28c3c3b0c66a6b280321b8065566b1995642c72c684
pdf-font-stream PDF embedded font (sfnt) at offset 0x8649 14280 bytes