Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1a75e813b5d111…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 16:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08736e9cb13629add17d91f378b5c733 SHA-1: 8487ceffaee50aa265600d05dc07e6c06807b0fd SHA-256: 1f1a75e813b5d111bdcef90b1713449f87e4d76297a5fa3ec5c68f59d3a70996
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=10+steps+to+improving+college+readin'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL and references to other PDF files. This suggests the primary intent is to redirect users to a malicious site, likely for phishing or to download further payloads.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=10+steps+to+improving+college+readin
    • https://static.usrfiles.com/ugd/f3cb45_8943c82703224130aff5cd787df63fd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d00699e14d084271a2a4c8d3ad75c5f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7112932bd574c32bcf9b88ad9cab949.pdf
    • https://static.usrfiles.com/ugd/d17951_c91cdf7eac5047cdb63e112cfc7d16a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e04bb1d1195e4d4fab22b1ded5a0f9f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a96d25c4cc5c480582757f9d36e12178.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d3e9abb2b6948a4a38ce6d4ba5f8abb.pdf
    • https://static.usrfiles.com/ugd/b11f6d_86f5954b3e104dc8a46602c7ce4374f6.pdf
    • https://static.usrfiles.com/ugd/41a0b6_4a46b476527943128b42b68ba23f13b7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65039204935.pdf
    • https://cdn.shopify.com/s/files/1/0448/0460/4066/files/2006_honda_civic_manual.pdf
    • https://cdn.shopify.com/s/files/1/0451/1550/6853/files/picsart_gold_mod_apk_pure.pdf
    • https://cdn.shopify.com/s/files/1/0437/8784/5790/files/fleetwood_mac_dreams_psychemagik_remix.pdf
    • https://cdn.shopify.com/s/files/1/0427/7937/7830/files/junezafugixuredasifuwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2279/4395/files/7657804448.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/tazekivat.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/zotuvudoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/bollywood_hd_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/81638612377.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_off000065fc.bin
a6f1bfd0047b469791e76acf8b7a129ada574cb622e6348e2b6c34b643407df0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FC 5552 bytes
font_01_sfnt_off000078c3.bin
5861d3f11365192141a5420b0927b3394c06e0f2538b760fc25ab831d3b01e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C3 11204 bytes

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