Malicious PDF — malware analysis report

Static analysis result for SHA-256 503d38361e3aa177…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 13:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be0992259d8d42a11c067bc8a06d0f69 SHA-1: e0b902180e6c7ebc8281eba53d0205196e5d1bf4 SHA-256: 503d38361e3aa1773c47aecad472a79e584ca05c968b6a95cde54982f08f1aba
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=magazine+letters+font', which is flagged as a malicious redirector. This suggests a phishing or scam attempt where the user is enticed to click the link under the guise of obtaining a font, leading them to malicious infrastructure.

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/wix?keyword=magazine+letters+font
    • https://cdn.shopify.com/s/files/1/0433/9662/8641/files/gavoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/69278501311.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/30806378442.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/vubulowonexufudij.pdf
    • https://cdn.shopify.com/s/files/1/0431/1397/1861/files/95821550529.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/divinity_original_sin_enhanced_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9301/7247/files/venodonivirotalujaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2224/5273/files/favaxepifed.pdf
    • https://cdn.shopify.com/s/files/1/0433/9538/3446/files/restaurant_marketing_plan.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/76957542625.pdf
    • https://static.usrfiles.com/ugd/33ab24_953459ca8c9545b59213b40d2fa57e17.pdf
    • https://static.usrfiles.com/ugd/b8c837_471ef8e33f964ebba8d3aa96f8b02e83.pdf
    • https://static.usrfiles.com/ugd/ca300b_2a1fc8792918447ba9e03d474f611a04.pdf
    • https://static.usrfiles.com/ugd/a86d68_84694c457e0048c88613c41a7b6c02f8.pdf
    • https://static.usrfiles.com/ugd/f84671_e2e2a50d4f1e455cbcc85c5422c9255e.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/fimajafaxaruf.pdf
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/36536384429.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_off000065b7.bin
fd01fb8501db9723fb1844a8e9935cf436575e4bf4d13849e7fd4457f4b441ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x65B7 4988 bytes
font_01_sfnt_off000076d7.bin
5f563fb6c34381251527a3b3e807f3e96bd21e95069735a5c203288ec46d2624
pdf-font-stream PDF embedded font (sfnt) at offset 0x76D7 10116 bytes