Malicious PDF — malware analysis report

Static analysis result for SHA-256 495780af03a655b5…

MALICIOUS

PDF

46.7 KB Created: 2020-08-14 08:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05dd3ac3dfd492c5b48c3a7dd9e300ba SHA-1: d63181a78350c15870a5f91353892e96854c0ee0 SHA-256: 495780af03a655b53f724feb292781b081cfa39f9cafc939d804b1110b3d4c92
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Another critical heuristic indicates a PDF link farm, with many links hosted on cdn.shopify.com. The ML classifier also flagged this PDF with high confidence. The document body contains text related to 'Bhairava geetha audio songs' and 'wkhtmltopdf', suggesting a lure to attract users via search engines, which then redirects to malicious infrastructure.

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.ru/pify?keyword=bhairava+geetha+audio+songs
    • http://files.projectufo.org/uploads/1/3/0/7/130739381/4877757.pdf
    • http://muderol.waldenfollies.com/uploads/1/3/1/3/131384401/c71c48.pdf
    • http://gasowelin.spusdvisualarts.com/uploads/1/3/1/8/131871991/0aa9e29cb1.pdf
    • http://files.durbanafrica.co.za/uploads/1/3/1/4/131406841/xaxodomofesoruf-xomuf-vezexuxarinovo-vajekekeram.pdf
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/wonidabevawegenatulebos.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/65807483228.pdf
    • https://cdn.shopify.com/s/files/1/0434/2670/9665/files/bible_dictionary_kjv.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/hanuman_chalisa_lyrics_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/fusionner_2_jpg_en_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/28457714113.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/38982214641.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3782/files/85842386943.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/english_synonyms_words.pdf
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/manual_de_arqueologia_forense.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_off00007552.bin
af81a8b3f3a7a85612de96021ebecbd8fce24afa62fc6927f9097f2591dab2f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7552 5164 bytes
font_01_sfnt_off000086e3.bin
b2729c63871da7e0792b01b7a69e9497a4a6af2782367bce35f66cf2161d7660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86E3 12360 bytes

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