Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a2e66f2e214a2c…

MALICIOUS

PDF

46.8 KB Created: 2020-08-08 20:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af32445b408cd91c9a0499036d2e3f4b SHA-1: eda7d49143bdd255d497feac95fc4a859db883bb SHA-256: 31a2e66f2e214a2c4758b0477856629e502fb00dbb49aa8a4a7bfef19518f939
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, disguised as a guitar chords lesson. The primary malicious URL is https://ttraff.cc/pify?keyword=guitar+chords+lesson+pdf, which likely leads to further malicious content. The document body is heavily obfuscated but contains the malicious URL and numerous other PDF links, suggesting a lure to drive traffic to potentially compromised or malicious sites.

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.cc/pify?keyword=guitar+chords+lesson+pdf
    • http://files.rebeccalynnphotography.net/uploads/1/3/0/8/130874518/4840188.pdf
    • http://files.bradswoodworking.com/uploads/1/3/1/0/131070207/3677826.pdf
    • http://vonelo.apwindowsuk.co.uk/uploads/1/3/1/6/131637257/fizufovon-vowimi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/82408871218.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/jibilutijulodenijufer.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/40302212216.pdf
    • https://cdn.shopify.com/s/files/1/0432/6080/5280/files/fibakojezip.pdf
    • https://cdn.shopify.com/s/files/1/0434/2674/2421/files/zusekavefokadovuwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/marathi_comedy_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/rails_status_codes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/lumofugewogawupe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/zojakag.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_off00007131.bin
0d446c12ec385eb315fb238270d1ee98ee950cae1a789191e6b388364e87baac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7131 5272 bytes
font_01_sfnt_off00008310.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8310 1800 bytes
font_02_sfnt_off00008b9e.bin
fd482d96d940e1a8c5381f40e3ffa1ab749bc1419f604693261fd77564a05f53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9E 10200 bytes

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