Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b3db9f295609d2…

MALICIOUS

PDF

41.6 KB Created: 2020-08-13 23:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3f70efd5d208770f62a9fed25d4c747 SHA-1: 5860c1be77a08f6a0ac7a939dbd98b16e6d086e1 SHA-256: 32b3db9f295609d27d7ba45b71e68bbd4456a015e7da1164e6d6bd8d389e2791
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=monthly+timeline+powerpoint+template', is identified as a malicious redirector. The document body is heavily obfuscated and appears to be a lure for search engine traffic, likely to distribute malware or facilitate phishing. 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=monthly+timeline+powerpoint+template
    • http://files.steamforwardlearning.org/uploads/1/3/1/4/131438195/vuvavim.pdf
    • http://files.impropera.co.uk/uploads/1/3/2/6/132681033/a02839f08de061.pdf
    • http://files.ampersandcurated.com/uploads/1/3/1/6/131606819/1617747.pdf
    • http://files.southplainsgentx.org/uploads/1/3/2/6/132681579/didizat.pdf
    • http://files.podiatryatknox.com/uploads/1/3/1/4/131453111/c8059bc2fd.pdf
    • https://cdn.shopify.com/s/files/1/0435/5316/1367/files/keto_sweets_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0449/6185/7695/files/ansys_motion.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/65077735367.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/anatomy_and_physiology_coloring_workbook_answers_chapter_14.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/64060947205.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3253/files/anastasia_once_upon_a_december_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/3_idiots_english_subtitle.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/69119231350.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/rasusaginowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/pugixivajoluw.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_off00006688.bin
c0ca5e170a42e03292d4fb5955a33b247d2449443ffa8b3874db5330471da283
pdf-font-stream PDF embedded font (sfnt) at offset 0x6688 5080 bytes
font_01_sfnt_off000077b8.bin
0a4e6f5f61dda1e8bd7be2b5f5d0a71129ef8af06040a9f04bbe4d1ad15144fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x77B8 9944 bytes