Malicious PDF — malware analysis report

Static analysis result for SHA-256 2746ef51e3ad245e…

MALICIOUS

PDF

49.1 KB Created: 2020-08-25 00:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac2d95f8131c2c8988fabcd703447903 SHA-1: cf2b49e1754ec66be5cbc24addbe2abdbd2f5df6 SHA-256: 2746ef51e3ad245e589fe026918c2a24da82f9cc40a111870a3408dc5833365a
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to disguise malicious activity as educational material. The ML classifier also 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=exponential+equations+exercises+with+answers
    • http://bovonip.larisamantordressage.com/uploads/1/3/1/6/131607163/2540473.pdf
    • http://files.thetruthwebdesigns.com/uploads/1/3/0/7/130775850/mujibovujox_dixezigujixuw_xizakebopinemet_muwijejuloriz.pdf
    • http://wiwib.harborcitythreads.com/uploads/1/3/0/8/130874524/7064617.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4013/files/xemevirefiraxogilibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/como_formatear_celular_fenix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49186839350.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/nudopegidewumako.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/minecraft_villager_workstation.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/netherlands_2019_tax_reform.pdf
    • https://cdn.shopify.com/s/files/1/0437/1703/4134/files/lifater.pdf
    • https://cdn.shopify.com/s/files/1/0430/9549/0721/files/wutip.pdf
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/65241332639.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/9059675439.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_off0000631a.bin
2bdde63a24f31719d5cbed6871bae9d22f91006f6e049f8b09a66e509177f0ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631A 5264 bytes
font_01_sfnt_off00007510.bin
5749befe8a728d4dfbe2563df7385e52901bae5c338059b380faf76238d087e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7510 14464 bytes
font_02_sfnt_off0000a2b1.bin
c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B1 16060 bytes

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