Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a4bb6eb55886e1…

MALICIOUS

PDF

45.9 KB Created: 2020-07-31 16:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d5c43fe61ba4dfb27724e3a64497fb9 SHA-1: d37f0fa32c0a29a0c81309685077fa71b63d7808 SHA-256: 51a4bb6eb55886e1fc9787f63dc382fe806143fa38c93ec9b88e71ed1d14c735
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=ender+3+start+gcode', suggesting a lure to a malicious site. The presence of numerous Shopify links, some confirmed benign and others unknown, indicates a broad distribution strategy. 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=ender+3+start+gcode
    • http://files.pound4poundathletics.com/uploads/1/3/1/8/131871816/2091625.pdf
    • http://files.mauriceparent.com/uploads/1/3/0/7/130738614/64e172e7e.pdf
    • http://files.darlingyoga.com/uploads/1/3/1/3/131398406/xekigotam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuvitew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/mipoxomowanemusabasam.pdf
    • https://cdn.shopify.com/s/files/1/0438/9958/4680/files/rekoninisituxunefe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5555/3432/files/20818617548.pdf
    • https://cdn.shopify.com/s/files/1/0435/4637/8404/files/29221420955.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/jekuwepoxivomafexobipi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/88573142180.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1954/files/18389709918.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/71143417673.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/80645244194.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.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_off000065a0.bin
67d48d0b216559c747459a65b2514e922fd25f5b7f5339fd3f1226f9b7851fbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A0 4936 bytes
font_01_sfnt_off00007660.bin
c7701b0b682c93ce33844f5526177be677f2307be54f756fd3cfb022cda76b20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7660 11832 bytes
font_02_sfnt_off00009cc8.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC8 4324 bytes

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