Malicious PDF — malware analysis report

Static analysis result for SHA-256 5712e543f848e5b6…

MALICIOUS

PDF

43.2 KB Created: 2020-08-20 00:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 667281e6b200722249cfa984b0866b31 SHA-1: e82e4135d324ec61bc027e96109bb66938cbca44 SHA-256: 5712e543f848e5b61505d42bf41612b9125143daed042e81b5506e185e9f9de1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'free chess titans game for android' and the malicious URL. This suggests a social engineering lure to trick users into clicking the link, which then redirects to potentially harmful content. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or distributing further payloads.

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=free+chess+titans+game++for+android
    • http://files.jessicabarkltheaterartist.com/uploads/1/3/0/7/130776499/5040195.pdf
    • https://cdn.shopify.com/s/files/1/0432/6588/4323/files/jugijoropasixetus.pdf
    • https://cdn.shopify.com/s/files/1/0429/8683/2035/files/vumakamijolotatebewepe.pdf
    • https://cdn.shopify.com/s/files/1/0438/4840/1046/files/bhartiya_samvidhan_in_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4505/9749/files/64555686409.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/16768404586.pdf
    • https://cdn.shopify.com/s/files/1/0440/6686/5302/files/newedesutojivemekarenotez.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/38655863062.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/sedra_smith_microelectronic_circuits_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/2226/9090/files/bafapeniranozobexote.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/41122145496.pdf
    • https://cdn.shopify.com/s/files/1/0445/3544/7711/files/adobe_acrobat_scan_to_free.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_off00006b1a.bin
8887ee03e160de05e7018594698bdb8cfed50f94c4a5223f565fc73a2f7c8f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1A 5356 bytes
font_01_sfnt_off00007d22.bin
4dd993758be7c544cba66b963941de4fb20aa85aaf65329ad3ed606c693bafa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D22 10180 bytes

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