Malicious PDF — malware analysis report

Static analysis result for SHA-256 c135909c0a9125c4…

MALICIOUS

PDF

40.2 KB Created: 2020-08-24 23:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c7cf33a5a6fed53a0e96e18b511f1bd SHA-1: 8a9704a930c2e18ebdf6afb7e8d2765271c8fa6b SHA-256: c135909c0a9125c44583ede32e3b865f83b6f3a7f132906ba58993f9e3be6c2c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=cars+cake+template', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=cars+cake+template
    • http://gunojipe.ordersocialeats.com/uploads/1/3/2/6/132682646/3227560.pdf
    • http://files.jackandjillroc.org/uploads/1/3/0/7/130776041/tigugibiki_momigegejata_pinuwonira.pdf
    • http://files.sorrowfulmother.net/uploads/1/3/2/6/132680822/ab2206.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/estimation_and_costing_book_by_rangwala.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1232/files/laboratoire_de_biologie_mdicale.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/beethoven_piano_sonata_13.pdf
    • https://cdn.shopify.com/s/files/1/0430/5498/9466/files/ma_pass_full_movie_free_300mb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3969/4741/files/91571489655.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/gunstar_heroes_rom.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0554/files/minijok.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/razoxowiwovijizizipodek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62092070186.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/nifowiginibevalaneboposuf.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_off00005e82.bin
968192e36d70c5da80217af94c3500c70ec4a2bb4b30d57cc3c99db50d8c4105		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E82 5048 bytes
font_01_sfnt_off00006f97.bin
7609a4d9c9486d929c6fde7005bcaa90ac6202ee54aa45aaf45246606961e25e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F97 10780 bytes

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