Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa0818d50155087…

MALICIOUS

PDF

60.5 KB Created: 2020-09-05 07:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d2e3f37e766c39f179d14d19e6d6735 SHA-1: 49ba454ae6487bd957798ab5bcf03517df7700d1 SHA-256: 3fa0818d501550870a9160c2aea272a725ed965af9b65a0a93a1612454f3a966
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links points to a redirector, indicating a malicious intent to direct users to potentially harmful content. While the document body is heavily obfuscated, the presence of numerous external links, including one to a known malicious redirector, strongly suggests a link-farming or redirection attack pattern.

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.me/wix?keyword=bootstrap+responsive+login+form+template
    • https://cdn.shopify.com/s/files/1/0436/4346/9974/files/strengths_and_weaknesses_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6605/files/loturelewijozoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/98983782862.pdf
    • https://cdn.shopify.com/s/files/1/0434/9136/0934/files/types_of_electrical_cable_glands.pdf
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/javascript_file_formatter_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1729/files/mary_go_round_spm_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/81806796226.pdf
    • https://static.usrfiles.com/ugd/b48b60_6ea1866a549248edb5f794eadddf4c0f.pdf
    • https://static.usrfiles.com/ugd/041b56_9d08b06be5cc422fbb05114a96b174cf.pdf
    • https://static.usrfiles.com/ugd/04c368_12de843e47ca493695ed8c5f496cae22.pdf
    • https://static.usrfiles.com/ugd/67e251_cc8bd330cf7b4181b9827cffdf0d7dc9.pdf
    • https://static.usrfiles.com/ugd/270e53_8528ba91dd0b4a4986be62382424160a.pdf
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/7235576989.pdf
    • https://cdn.shopify.com/s/files/1/0438/5262/8118/files/toxig.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4307/files/67231019926.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_off0000b0bf.bin
474dfc1a5c6117d523adcad2a3c83890a037e68f79b52eca9663942c36f1b45c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BF 5328 bytes
font_01_sfnt_off0000c2d9.bin
526ecb4bff25c92181f93cd5900aeb641979ffdb4ec9b988c06d0a141e657859		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D9 9892 bytes

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