Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d9dd99173b8aa1…

MALICIOUS

PDF

43.3 KB Created: 2020-08-21 06:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 718437fe045df91df723ec0221b388a3 SHA-1: d9f9bc52c218130949e4aaf82511ec207380523e SHA-256: c3d9dd99173b8aa1cd986a4e2664c80832a608763b4482de6f463ffef463b739
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=android+9+split+screen+samsung+s9'. The document body, though heavily obfuscated, contains keywords related to Android and Samsung, suggesting a lure to disguise the malicious intent. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning tactic to distribute the malicious content.

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=android+9+split+screen+samsung+s9
    • http://files.wakingupwilder.com/uploads/1/3/0/7/130775014/2294534.pdf
    • http://kotimefid.colonnadeqatar.com/uploads/1/3/1/8/131871479/5272997.pdf
    • http://zinori.arnoldcameraclub.com/uploads/1/3/0/7/130738732/zosinete.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/jubolij.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/durakapawawefetorupupijug.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5662/files/definisi_alkalinitas.pdf
    • https://cdn.shopify.com/s/files/1/0438/3254/1344/files/bwv_846_prelude_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/jorefatorisodupagu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/wizopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9715790575.pdf
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/kivuzewadujetekoz.pdf
    • https://cdn.shopify.com/s/files/1/0443/5696/0412/files/hamilton_beach_roaster_oven_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/vejotoribelotebodol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/54845148376.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/foxefew.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/
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/durakapawawefetorupupijug.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b9f.bin
966d6a1077f40ed3e4726e90e30ab85ee05144d736ca17219a2edeb3f1b6a469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9F 5540 bytes
font_01_sfnt_off00007e50.bin
78c83345305b293c02f6facb46fe4290a099944b841f3f5d753c3c780473973f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E50 9852 bytes

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