Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e428fbde9e451c…

MALICIOUS

PDF

49.6 KB Created: 2020-08-09 12:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86c459021637ae6820bf3fb5c598dd81 SHA-1: 35fa7f6f58329111b0aa0881a3996e9d4709cc87 SHA-256: e1e428fbde9e451c99b7f075070211242224c0c0f4a626a533107fb796bfd555
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating it's a malicious redirector link. The primary malicious URL is `https://ttraff.ru/pify?keyword=ahmet+hamdi+tanp%25C4%25B1nar+huzur+roman%25C4%25B1+tahlili+pdf`. Another heuristic identified a PDF link farm, suggesting an attempt to manipulate search engine results or distribute multiple malicious links. The document body contains garbled text along with the primary malicious URL and several benign-looking Shopify URLs, likely part of the link farm.

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=ahmet+hamdi+tanp%25C4%25B1nar+huzur+roman%25C4%25B1+tahlili+pdf
    • http://gepofin.lavidawithwings.com/uploads/1/3/2/6/132681946/paneded.pdf
    • http://files.sierranevadafc.com/uploads/1/3/0/8/130814390/ludozezixewuturefita.pdf
    • http://files.treasuresofthehudsonhighlands.com/uploads/1/3/1/4/131406736/pisojaki.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/adani_ports_annual_report_2020_18.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lexopiwalosadatijasaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9365/files/takigirawidajugor.pdf
    • https://cdn.shopify.com/s/files/1/0448/2197/1104/files/ancient_greek_etymological_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0439/1455/9656/files/anemia_falciforme_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0438/1723/8685/files/d_d_3._5_ghostwalk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/68693495581.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/xexereveta.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/52429642712.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/nuzevav.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/35144211832.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_off0000810d.bin
b24ba375939d17c543157ea4ae1e895027f3d0c07b323695a03c9f495e6511e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x810D 5176 bytes
font_01_sfnt_off00009289.bin
9b5ff0c4a1c4ea53ef0e4f10da48f688a4e42b48a274743f455371fa126169aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9289 11764 bytes

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