Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ad49c78113ea15…

MALICIOUS

PDF

46.1 KB Created: 2020-08-30 04:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f783fe3a424d17edba9a7c8f6ea9c72 SHA-1: 1bd433a8737e10fd48dc98ae4b4e43ca7592aee7 SHA-256: a1ad49c78113ea1597fd5a80c9e94ea42c2777350c3151f721553ce02aadd35d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one heuristic specifically identifying a link to a known malicious redirector. Another heuristic flags the document as a link farm, indicating a large number of external links. The primary malicious URL identified is https://ttraff.com/wix?keyword=from+basics+to+fine+art+pdf, which is likely used to direct users to a malicious site. The document body itself is largely unreadable binary data, but the presence of the malicious link is the strongest indicator of malicious intent.

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/wix?keyword=from+basics+to+fine+art+pdf
    • https://cdn.shopify.com/s/files/1/0435/2199/9003/files/chakravyuha_ambarish_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/3_point_turn.pdf
    • https://cdn.shopify.com/s/files/1/0434/6966/8517/files/zugimevozel.pdf
    • https://static.usrfiles.com/ugd/64d889_45b6590fbad14667926d2cac02e01643.pdf
    • https://static.usrfiles.com/ugd/bae363_751a8161736f43539d001145e29975ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce9bef7a5b524514a2015b534cdf4826.pdf
    • https://cdn.shopify.com/s/files/1/0433/5573/4167/files/maniac_magee_summary.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/gefusamovabewox.pdf
    • https://cdn.shopify.com/s/files/1/0435/4487/1063/files/wifibugusagib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/85120673125.pdf
    • https://cdn.shopify.com/s/files/1/0433/6880/8613/files/megodugiguduk.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_off000075bc.bin
708d4b762b7b724fdfb48b503deba78ae23d641353ab53d2e8d2f0c792c0b47e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BC 5364 bytes
font_01_sfnt_off000087d7.bin
17d993b786f489dd7876d83671f916472b15c5921df5aa4afca143512432ae0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D7 10468 bytes

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