Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd13bf13dcfccc8…

MALICIOUS

PDF

49.4 KB Created: 2020-08-03 03:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1d0cccbf3549328869cc58f6f76ae17 SHA-1: 5abd2ffe7279f0a7d3f4fa9fb4279e7bc357b106 SHA-256: fdd13bf13dcfccc8364ddd80ecb55650bdf1a9492e9ee52698be174df99080f7
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to 'ttraff.com', a known malicious redirector. The document also contains a large number of embedded links to PDFs hosted on Shopify, likely part of a link farm to improve SEO for malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=how+to+write+a+rogerian+argument
    • http://files.farmsteadproducts.com/uploads/1/3/0/8/130874257/9406405.pdf
    • http://files.nelliecalkins.com/uploads/1/3/1/3/131380297/jememisijodune.pdf
    • http://files.celestecollegeofintuitivemassage.com/uploads/1/3/0/7/130738823/201a2cee.pdf
    • http://files.narrativeimaginings.com/uploads/1/3/1/3/131379894/312cb194f8e.pdf
    • http://files.terindahestate.com/uploads/1/3/1/1/131164419/xusugevuzukadak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9529/4105/files/kawikubodi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/risegajas.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/77326992729.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/36470145518.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/relanavunenazuxobemi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/uzer_name_and_pasword_nod32.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/medimud.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8744/files/34254693915.pdf
    • https://cdn.shopify.com/s/files/1/0432/0077/4308/files/dobamemezafusupom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/50352766627.pdf
    • https://cdn.shopify.com/s/files/1/0432/5215/4532/files/dabuferirakul.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7365/files/96736512016.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_off0000790c.bin
cbac997b9cd54dc71cd75fa227fe55ac2e0872f4693e5c27d7edfa908a695568
pdf-font-stream PDF embedded font (sfnt) at offset 0x790C 4732 bytes
font_01_sfnt_off0000890f.bin
ffb683bc30ea00fd0f18b2968f291cf86231e7f039d3121ecdace2c8dbbd4f34
pdf-font-stream PDF embedded font (sfnt) at offset 0x890F 9740 bytes
font_02_sfnt_off0000aa4c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA4C 4324 bytes