Malicious PDF — malware analysis report

Static analysis result for SHA-256 401185a0f0992f6a…

MALICIOUS

PDF

38.0 KB Created: 2020-08-16 20:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 955fbe467b34b08f26d903c42b393802 SHA-1: f0472f3e69949346705a2c4e191e48340d6ad5f8 SHA-256: 401185a0f0992f6a1f944d57384e7ff5c22a209d64fc024b4812f53d9f5d62bd
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to link farms hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body text, though partially corrupted, contains keywords related to unemployment and training, suggesting a social engineering lure. No scripts were extracted from this sample.

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=chomage+demission+formation
    • http://jixoz.blueschoolarts.com/uploads/1/3/1/4/131409090/kogowunudesavi-rezurujixofilot-wixoda-jukedi.pdf
    • http://duwosaw.wendijensen.com/uploads/1/3/0/9/130969754/751e2.pdf
    • http://baxorox.reynoldsbaptistchurch.org/uploads/1/3/1/0/131069759/415834.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/suganujixufopigagutiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/30666219267.pdf
    • https://cdn.shopify.com/s/files/1/0434/1134/1479/files/88583037022.pdf
    • https://cdn.shopify.com/s/files/1/0437/8220/9698/files/passing_chords_for_worship_songs.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/8582239711.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/19093099547.pdf
    • https://cdn.shopify.com/s/files/1/0439/4424/7451/files/sokagos.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/cooling_tower_types.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/denorowowivenudel.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_off000058f4.bin
1af016a61a9367370d6f5466ae5235903269afe92e9797cfe3e5c209c9da8f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F4 5192 bytes
font_01_sfnt_off00006a77.bin
a682a762b8a760fd7e25de17b94ea86000fc05b42c099891e0efc30460426230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A77 9704 bytes

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