Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46aa64b88ccb68d…

MALICIOUS

PDF

55.6 KB Created: 2020-08-30 13:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a0849e6e51b2b0b7991d5dcf3845ae2 SHA-1: f36f150439cc49e626dca096ef6ca9ba3bf1d011 SHA-256: d46aa64b88ccb68dabe957daa9c14a09923a4117e58283ea9a0247733ad10a81
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 'https://ttraff.com/wix?keyword=noun+clause+vs+adjective+clause+quiz'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to 'static.usrfiles.com'. The document body, though partially corrupted, contains the same quiz topic and the malicious URL, suggesting a lure to a phishing or scam page. 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/wix?keyword=noun+clause+vs+adjective+clause+quiz
    • https://static.usrfiles.com/ugd/b8c837_9f6098a780084613aac26b7d57425968.pdf
    • https://static.usrfiles.com/ugd/760101_d48157d02835485e9c56d2d2cfb7f2fc.pdf
    • https://static.usrfiles.com/ugd/8d57bd_4d818cb2de3a4aaea6e9855c0dd91747.pdf
    • https://static.usrfiles.com/ugd/affb4a_45bdb6f3a2c943d4bfde22815529dd07.pdf
    • https://static.usrfiles.com/ugd/b50c55_b8ac3fa39e0e45028554152ceb17cded.pdf
    • https://static.usrfiles.com/ugd/6924eb_140fbeb540bb45a49aea146928c63542.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5b233dc73fd4a88a304364b1932c1ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_8997aafa3f27494ab9722614bebfc825.pdf
    • https://static.usrfiles.com/ugd/b58d21_44441b1e38d74263a0f20dafd9d2f88e.pdf
    • https://static.usrfiles.com/ugd/4b7290_4326a9a464994996b758f117471189f6.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/android_oyun_club_gta_5_oyna.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/46625029252.pdf
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/scrabble_online_free_no_against_computer.pdf
    • https://cdn.shopify.com/s/files/1/0436/9478/4665/files/bank_po_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4097/files/lalofikagabap.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/tobapuwujugesalexapof.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008377.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8377 2828 bytes
font_01_sfnt_off00008d72.bin
3f01541aa93ac1faa0e31e13d258e31d7947c1030108689bfe4b0f001887ac94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D72 5116 bytes
font_02_sfnt_off00009f03.bin
654940fab7d7fd6dec5eb11b962b65cee04cfcbe67d1e8c3a24c3685c1ee1310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F03 10096 bytes
font_03_sfnt_off0000c1c4.bin
e407a94759f6597b925923ac5fe0da6546c555664b61564e908290ccba62ef29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C4 3460 bytes

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