Malicious PDF — malware analysis report

Static analysis result for SHA-256 08193a064573b1e2…

MALICIOUS

PDF

40.9 KB Created: 2020-08-19 16:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bfe328408ec2b3e2439a04a7507b0d5 SHA-1: 92f41c56449252bd8675c510b201d957b0f684ee SHA-256: 08193a064573b1e29cd95e257e80fb60ef6a9dcd366716512d1b8340e32191bf
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text fragments that appear to be a lure related to a 'powercfg/batteryreport error'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used to obscure the malicious destination. The ML classifier strongly indicates maliciousness.

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=powercfg%252F+batteryreport+error+0x10d2
    • http://files.michisboutique.com/uploads/1/3/1/4/131483002/6587822.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/8086_assembler_tutorial_for_beginners_part_2.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/56542017333.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6387/files/45537427177.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/nafefakarafiwivor.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/soulja_boy_dance.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/philips_respironics_system_one_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5676/files/gidonurigopanivunokixine.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/70095454805.pdf
    • https://cdn.shopify.com/s/files/1/0436/9616/0923/files/wimovu.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_off00005ec2.bin
cb2fb03dec8fec4452c3bcb2ff8a24e32f682dabdbe5227ee02b1ed8851a0efc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC2 5876 bytes
font_01_sfnt_off000072fa.bin
bc33789eb071ff599362c3f81806799a553d8b4b3729ca528c3606517892b9d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x72FA 10572 bytes