Malicious PDF — malware analysis report

Static analysis result for SHA-256 a096099565f3bf86…

MALICIOUS

PDF

46.6 KB Created: 2020-08-02 09:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9992b47298510affaf3a6e5e6f4405e4 SHA-1: 14b33775df6f795fb12d127a606b8c95f6465c02 SHA-256: a096099565f3bf860a074fd5d7c2f72ee925fdbe6889a1b0bbef29bc07e07c41
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to unit conversion, likely a lure. The PDF also exhibits a PDF_SEO_LINK_FARM heuristic, suggesting it contains numerous external links, many of which point to potentially malicious or unknown domains. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=kg+to+lbs+conversion
    • http://files.kzoorca.org/uploads/1/3/0/8/130874180/48674c.pdf
    • http://files.kimkirch.com/uploads/1/3/0/7/130775827/welobozutudirol-fulunim.pdf
    • http://files.paintingwithjustin.com/uploads/1/3/0/7/130740458/bivupufulaxuduk.pdf
    • http://files.rootsandwingsmidwifery.com/uploads/1/3/0/8/130874490/zaxoxarosi_vakaw_kusukasulelijav.pdf
    • http://files.allentenbusschen.com/uploads/1/3/2/7/132712005/lujemugezatukizak.pdf
    • https://cdn.shopify.com/s/files/1/0431/9756/3037/files/63937261680.pdf
    • https://cdn.shopify.com/s/files/1/0435/4349/4807/files/64013036893.pdf
    • https://cdn.shopify.com/s/files/1/0437/4478/8634/files/zozulovejitizafoweke.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/24407816631.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/64262689320.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/xoxowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/android_color_xml.pdf
    • https://cdn.shopify.com/s/files/1/0437/3613/7882/files/29630335043.pdf
    • https://cdn.shopify.com/s/files/1/0433/0304/3230/files/xuzijipexosekagebo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/dufupatupiliwadon.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/zosizixe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5651/9576/files/16643656702.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/64949986339.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_off00006914.bin
0b7caac64d6f45e010e611dbb9370abecd22aff91aceb202dc9dcdc654e4f328
pdf-font-stream PDF embedded font (sfnt) at offset 0x6914 4712 bytes
font_01_sfnt_off00007930.bin
21122bd66c4d5e1adbe01ce822df8358d86cbed9b13b01402ff26953cc6fd96d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7930 11680 bytes
font_02_sfnt_off00009fa1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA1 4324 bytes