Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4b475d776d5627…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 11:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0454c27fce0d71aa32147d7abaf9dd2c SHA-1: 3e1b9f034b035204e9bc35228229552b754e6d68 SHA-256: cc4b475d776d56274749a9b70468fffd364ddd8cad17ba0715858b68dd540414
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including one that redirects to known malicious infrastructure. The document body text, though garbled, contains a lure related to 'Gateway b2 teacher's book answers' and the primary malicious URL. This suggests a phishing or scam attempt designed to trick users into visiting a malicious site. No scripts were extracted from this sample.

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=gateway+b2+teacher%2527+s+book+answers
    • http://dosalo.hottopicstalkradio.com/uploads/1/3/2/6/132681495/4f31b019a1f.pdf
    • http://fefakibon.labelletraining.com/uploads/1/3/1/1/131164250/2994495.pdf
    • http://dufutu.ochsspiritwear.com/uploads/1/3/0/9/130969204/ad72a97.pdf
    • http://bazemitef.bluesensation.org/uploads/1/3/0/8/130813366/7112172.pdf
    • https://cdn.shopify.com/s/files/1/0435/3143/6186/files/givanikariv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/wegoguxafiwepexozudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0448/3104/7842/files/wemagebojosajoxojononumu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3947/2288/files/icao_aerodrome_design_manual_part_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/97112473910.pdf
    • https://cdn.shopify.com/s/files/1/0429/5321/2060/files/26812676758.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/sakuremawakenoxugaje.pdf
    • https://cdn.shopify.com/s/files/1/0436/0496/7581/files/sokadudelalikuxedanareken.pdf
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/anatomy_and_physiology_textbook_for_nurses.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_off00005a01.bin
9fc760b4fd0d4935fa0eef71e9821bb0da4ffd94457104c1a2811ebcdadce584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A01 5192 bytes
font_01_sfnt_off00006bbf.bin
2355294586554846d5e9dd7ad4fcb6d01d9ee35e3ed651c62be2e47455115614		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBF 12480 bytes
font_02_sfnt_off0000935e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x935E 4324 bytes

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