Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0cd2864b4eedf6…

MALICIOUS

PDF

41.9 KB Created: 2020-08-02 03:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df6f0b77290d596968697fb12e52e80f SHA-1: b60691cc6a47073829f690bd402c0873a577b493 SHA-256: bc0cd2864b4eedf63f3025f324f1dc652884b19e9d8c993311eb9aecc148f2ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, with the first being a Shopify-hosted PDF. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=zenith+remote+controls', suggesting a lure to a malicious site.

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=zenith+remote+controls
    • http://files.foodloveblog.com/uploads/1/3/0/7/130775215/2958046.pdf
    • http://files.rootenergyadvisors.org/uploads/1/3/0/7/130776594/1525103.pdf
    • http://files.va-homeinspections.com/uploads/1/3/0/9/130969633/3000120.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/gikexabaruzagokaxibokada.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33971068516.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/sapukubolanakumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/5041975244.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/kupanafotuvozixuramizin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevola.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/90073392889.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/jikemitokokaropo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/53428726168.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c14.bin
05b7c9815ea96e0fde2877460cb9e2245bf2066253ddae8af98b983cedcda55c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C14 4576 bytes
font_01_sfnt_off00006b61.bin
40f4198dd0886090389b1b99518f9d06a4a6ce8840eb2344302542ca9e32c479
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B61 9960 bytes
font_02_sfnt_off00008d3c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3C 4324 bytes