Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8bd9f66de5f2900…

MALICIOUS

PDF

92.5 KB Created: 2020-07-31 22:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce5842c86d96d058a56f242bfb465e5b SHA-1: bcec31b84ac687ca872993dbcdd4b0d40f5e9c3a SHA-256: f8bd9f66de5f29009e066f1d70b12091f2c48fa6dc34d17202da8c1cc91be6f6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell 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 an attempt to lure users to potentially malicious content. The presence of numerous external PDF links, many hosted on shopify.com, indicates a link farm strategy, likely to improve SEO for malicious content or to distribute further payloads.

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=big+papi+net+worth
    • http://files.katebenderart.com/uploads/1/3/0/7/130740571/eda26140.pdf
    • http://files.jetvideoonline.com/uploads/1/3/2/6/132682327/jomavedebuninudatito.pdf
    • http://files.montessori-mag.org/uploads/1/3/0/9/130969917/1b8b9446f63.pdf
    • http://files.cplcp.org.uk/uploads/1/3/1/4/131438308/kibazapidakemex.pdf
    • http://files.brucesbreads.com/uploads/1/3/1/4/131407802/6986769.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/94041456830.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/16971092982.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/90564042066.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/linod.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/79605724459.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/91983885176.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/72447084118.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/7010/files/94035875677.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/54972270021.pdf
    • https://cdn.shopify.com/s/files/1/0428/9242/7430/files/jegagasafu.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_off00012e43.bin
24f883a80b5ed71be016dcae7fd929963c0535ea6f78c43bc01d842bc4fa50de
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E43 5012 bytes
font_01_sfnt_off00013f64.bin
3c6a49280697ae731986a39a392765c9034d0d11da83976bdf102cee63709417
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F64 10872 bytes