Malicious PDF — malware analysis report

Static analysis result for SHA-256 c282a171d0b960ed…

MALICIOUS

PDF

43.8 KB Created: 2020-08-12 17:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d74483c5e303d3e809547277cee03924 SHA-1: 6e07a95d5f755e0490ae09d5e32f756ef08237b6 SHA-256: c282a171d0b960ed24c11a36d0212dd4446f745094e8925f39191432c8e4fe0f
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector. The document body explicitly contains the URL 'https://ttraff.com/pify?keyword=aces+high+guitar+tab+pdf', which is likely intended to trick the user into downloading further malware or visiting a phishing site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=aces+high+guitar+tab+pdf
    • http://files.3rdgearwaseca.org/uploads/1/3/0/9/130969728/dezojutugabaj_nodomadiluzek_nutilixivubaxi_kekibubijenales.pdf
    • http://files.portuguesestonethenaturalpath.com/uploads/1/3/1/3/131380305/7294663.pdf
    • http://files.lauraschultzyoga.com/uploads/1/3/2/6/132695212/tinokebadivodapaba.pdf
    • http://bevifuxik.tmcdressage.org/uploads/1/3/1/4/131454373/bisidojusikobasob.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6510/files/fozagasolazanivikusab.pdf
    • https://cdn.shopify.com/s/files/1/0454/7185/8838/files/jet_airways_crisis.pdf
    • https://cdn.shopify.com/s/files/1/0446/9293/0716/files/jovuluwisaxala.pdf
    • https://cdn.shopify.com/s/files/1/0451/4299/9194/files/english_phonics_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/76213522535.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/square_root_of_180_simplified.pdf
    • https://cdn.shopify.com/s/files/1/0432/0346/1283/files/82263693762.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6507/files/beginners_guide_to_intermittent_fasting.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/lidatafigune.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/13933636017.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/zuzolaruragewofikuzefut.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/dukibarikowupufurumavezoj.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_off00006347.bin
2e29ff93fa749dbe6e8829fbdf33efcb06ab0fa47c32bb1d950b9acfa5c7379d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6347 5516 bytes
font_01_sfnt_off000075f0.bin
797b52765825545fff41eebe5103fb1a783f4bc5606c67104a3c58e38f70098c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F0 14120 bytes

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