Malicious PDF — malware analysis report

Static analysis result for SHA-256 63697cd559df463d…

MALICIOUS

PDF

43.4 KB Created: 2020-08-23 07:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 114754c54007e8f7afaf25c83652cd9a SHA-1: 17fbbe26fba46f1441a12ec17081e0669933717f SHA-256: 63697cd559df463d6bf3becb8061cc0e69486a87643f382765548146ee3187b3
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, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to a Bosch dishwasher manual. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to Shopify domains hosting other PDFs, likely part of a link farm. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification.

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=bosch+dishwasher+sms63l02ea+manual
    • http://files.athomedogeuthanasia.com/uploads/1/3/2/6/132695339/5094558.pdf
    • http://files.cosmexmelbourne.com/uploads/1/3/1/4/131483491/7508292.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5486/6337/files/98544787584.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/pomelanikowovo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/neburemajukonupe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6262/3397/files/binomial_coefficient_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/3604/9571/files/nebolomudit.pdf
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/78672875588.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/95263971040.pdf
    • https://cdn.shopify.com/s/files/1/0440/6027/8936/files/75736221488.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4511/6311/files/7577508781.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/botudifofefofovikavuzatid.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9753/files/53945685920.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_off000067d8.bin
1000526e59c1836f27af7b05e1fda3c50ef9b27471eb3aed5810c4468d783227
pdf-font-stream PDF embedded font (sfnt) at offset 0x67D8 5912 bytes
font_01_sfnt_off00007bde.bin
ae5fa969c381b8160ce16256365b4777a9fb2b5565c647fec2c8e1f6a11f3cc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDE 11112 bytes