Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a17caad7fe4fd0…

MALICIOUS

PDF

61.2 KB Created: 2020-08-23 05:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7be8c13dfc03594575fac8b7d6b9f790 SHA-1: a41985c0948ff88d01286b7d76b426faa1653cab SHA-256: 17a17caad7fe4fd0476bdc9a4c64af90e686305f3966d602acdb13faa40f1972
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with a critical heuristic identifying it as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=cansat+project+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious infrastructure. No scripts were extracted from this sample.

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.ru/pify?keyword=cansat+project+pdf
    • http://gatoz.chathamhigh1969.com/uploads/1/3/2/6/132681396/f923795.pdf
    • http://files.universalshowqueenpageant.com/uploads/1/3/1/4/131453251/sonudagebi.pdf
    • http://files.armadaseamlessgutters.co.uk/uploads/1/3/1/3/131381021/vojoxu-xonetisomel-bejekebi-tugeronixo.pdf
    • http://files.blairiouspetsupplies.com/uploads/1/3/0/8/130813409/9b53550ee4bc.pdf
    • http://files.butterflyworldcoombs.com/uploads/1/3/2/8/132815015/d73b55c2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2036/9567/files/line_break_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4439/files/fluoroscopic_guided_injection_hip.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/visogozodetexo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/41203865231.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/4202036917.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/sports_vocabulary_words.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/konubanuse.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/kitaxegosexodamesaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/nebosotisibeserisumawezo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a4dc.bin
a1324b2c8b012cfa88a0b4a41bfc6b7e5af4b766318ecb831da28be26454ce06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4DC 3512 bytes
font_01_sfnt_off0000b188.bin
2b98495052f880e24c4cd3b18c505a1b12fe17090e923d9b57b9c39f4dd27584		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB188 5096 bytes
font_02_sfnt_off0000c2ef.bin
0efa0140f83d7390abe22abba3ea966fcd3fcc0ad9aa5fbc691e731c1a807712		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EF 10652 bytes

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