Malicious PDF — malware analysis report

Static analysis result for SHA-256 579ea999ca1ac4a3…

MALICIOUS

PDF

41.0 KB Created: 2020-08-18 20:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2921d4f30a3c40dd956342513dc0446a SHA-1: bca733b2329a8193dc44028b1d8e5ef2530db445 SHA-256: 579ea999ca1ac4a3ee80215f06e1d29d5eb510b308c24386c82f88fc164b0339
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=wow+classic+shazzrah+guide
    • http://files.avatarborzoi.com/uploads/1/3/1/3/131379181/98817fcde8.pdf
    • http://wafetagil.turningdesign.com/uploads/1/3/2/7/132740214/33d6b07246bd.pdf
    • http://files.leopoldconst.com/uploads/1/3/1/4/131454024/1d918d3bbe96.pdf
    • http://files.inspiredbygeology.com/uploads/1/3/0/7/130740055/f5cf7f3869.pdf
    • http://files.cajuncorral.com/uploads/1/3/1/4/131437595/rulorubeveruf.pdf
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/pajobofumofisutipokaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/nowuxidusolutufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1313/6799/files/reletofubejoziba.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/98992499132.pdf
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/ruduv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/4914885440.pdf
    • https://cdn.shopify.com/s/files/1/0438/8392/1563/files/11537466471.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/pujanemegugapukejavar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3873/files/d_d_5e_dm_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/xibunem.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_off000060c8.bin
bf473217d51d029d8be721abc54c4b6738e6fdcb5a8b9d3671b6a96033a4e4cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x60C8 5356 bytes
font_01_sfnt_off0000730d.bin
10a50f90c826c996f1725d3ab260e9cccc3f5c9f5e7de8b23e4c8613e03979c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x730D 11004 bytes