Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c852f40c665b5f…

MALICIOUS

PDF

45.9 KB Created: 2020-08-08 04:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2d240aa6c170d50c48babd05e924b5a SHA-1: 33a863318eb83fb7f3ef75a039f7a898efc08938 SHA-256: 56c852f40c665b5f27c72126c3eb3eeb08e956bae8b300275b11cb66711fb156
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=jurnal+akuntansi+syariah+terbaru+pdf'. Additionally, it exhibits a PDF link farm, suggesting an attempt to distribute or obscure malicious links. The ML classifier strongly supports the malicious verdict. The document body, though heavily obfuscated, contains references to the redirector URL, reinforcing the attack pattern.

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=jurnal+akuntansi+syariah+terbaru+pdf
    • http://files.collezioneteja.com/uploads/1/3/1/8/131871433/80ea14ab2.pdf
    • http://files.touatvue.com/uploads/1/3/1/4/131406663/mujili.pdf
    • http://files.joemusselwhitegardendesign.co.uk/uploads/1/3/0/7/130740530/kabexejulo.pdf
    • http://files.crescentsecurities.in/uploads/1/3/0/9/130969986/mojulu-zisuwi.pdf
    • http://files.faunafloraterra.com/uploads/1/3/0/7/130739169/8815180.pdf
    • https://cdn.shopify.com/s/files/1/0432/8865/8078/files/362421075.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/66164204024.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/information_security_analyst_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/53996242036.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/97173062202.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/kavelimupasabotib.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/algebraic_fractions_puzzle.pdf
    • https://cdn.shopify.com/s/files/1/0438/3123/0614/files/mr_coffee_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/accounting_concepts_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3928/files/metemule.pdf
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/kinds_of_adjectives_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7440/files/xanelesarotom.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_off000074d2.bin
cf00fe1172a591f1ec732250d31653b030b4ad2916b08faf5c97e02495ec51ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D2 5424 bytes
font_01_sfnt_off0000873f.bin
af24dddc84729bb0dda2e90d78b7664c837958f715b40d5c2761d5db18c168fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x873F 10356 bytes