Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa8bb9d1ea5e469…

MALICIOUS

PDF

57.8 KB Created: 2020-08-19 21:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4087461aa9529c46c084858bdebfa8b9 SHA-1: b3eecf46d30bbac358a098d88929edb850865a33 SHA-256: 8fa8bb9d1ea5e469ec177a03493ff8c4052b9746e7384d381c12fe862815c09f
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify-hosted PDFs. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect users to malicious infrastructure. The presence of a 'download button' heuristic further supports a lure-based attack. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=upload+file+using+ajax+without+formdata
    • http://files.crossfitkenmore.com/uploads/1/3/0/8/130813694/46aedc981e527.pdf
    • http://kogim.muttblanks.com/uploads/1/3/1/3/131379578/87939379cc1.pdf
    • http://files.elysejahnke.com/uploads/1/3/2/6/132696558/liturex.pdf
    • http://files.seresearchcoalition.org/uploads/1/3/1/4/131407088/f3cf03.pdf
    • http://kejilod.stpaulscollingswood.com/uploads/1/3/1/1/131164243/ladere.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/bafufelavifipudavegivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/8144983711.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/mujejeno.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/haggard_crossword_puzzle_answer.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/34618199587.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2245/files/94._9_tampa_radio.pdf
    • https://cdn.shopify.com/s/files/1/0435/4847/5541/files/binotizonimurizuvumuso.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/design_thinking_process_methods.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/vikings_season_3_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/urolithiasis_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/pedepefalos.pdf
    • https://cdn.shopify.com/s/files/1/0432/0673/8079/files/walbro_carburetor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8869/0841/files/windows_movie_maker_tutorial_for_beginners.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/
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/pedepef

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079da.bin
62ea6e9affe9ca1ec0a1771165782cee3de7181b6624faaba90c7f929dae22d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DA 5564 bytes
font_01_sfnt_off00008ca6.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA6 1800 bytes
font_02_sfnt_off00009533.bin
68444892db4a9903c174503b621741108363a5207590ae00653ed5f1e8480485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9533 16680 bytes
font_03_sfnt_off0000c92d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC92D 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.