Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da8c466eae5ad7c…

MALICIOUS

PDF

40.0 KB Created: 2020-08-15 06:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 473bd0ad922d3d46a1394b16268b585b SHA-1: 7a4b337d7eedb4e7f535529952740ce4214d7ef6 SHA-256: 4da8c466eae5ad7cd6768b1375bdf1c6e4428169dc747c569e61b5c0d7040740
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a PDF redirector link pointing to ttraff.ru. Additionally, another critical heuristic detected a PDF link farm containing numerous external links, with the dominant host being cdn.shopify.com. The document body contains obfuscated text and embedded URLs, including the aforementioned redirector and several Shopify-hosted PDFs, suggesting a lure to external malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=barish+ki+bunde+video
    • http://bitifap.christiancyclingtucson.org/uploads/1/3/2/6/132695384/c9cbfff12.pdf
    • http://files.boyter.com/uploads/1/3/0/7/130739376/penosor.pdf
    • http://files.littlervrentals.com/uploads/1/3/1/1/131163590/5471008.pdf
    • http://files.peoplespotato.com/uploads/1/3/1/4/131438282/2624095.pdf
    • http://sirudawet.mrstaylor-lc.com/uploads/1/3/0/7/130739059/lawozo-lumijupuxajok.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3541/files/59058734052.pdf
    • https://cdn.shopify.com/s/files/1/0433/4105/4105/files/loan_application_form_file.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/tokyo_esp_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/52445729221.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/best_mage_leveling_spec.pdf
    • https://cdn.shopify.com/s/files/1/0430/0220/0223/files/51542743856.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/44919613503.pdf
    • https://cdn.shopify.com/s/files/1/0432/2587/4600/files/8994516866.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/katagujuvaguledi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/15756464052.pdf
    • https://cdn.shopify.com/s/files/1/0433/2191/7598/files/reading_and_writing_skills_deped.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_off00005548.bin
611e17aafb6aa65abccc979b8bf1b9995308c4e26147a1035b32fcc52b56f7f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5548 5196 bytes
font_01_sfnt_off000066e2.bin
90fa4d23d518d23cc5c3e02acd6a66b0b01421ce5593e21ce88931710a8018e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E2 14280 bytes

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