Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c5ccdb1e109e82…

MALICIOUS

PDF

47.7 KB Created: 2020-08-11 23:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9505638c33cdf91d364e647240b79f82 SHA-1: 599acca5a7c75f840aca127f1c6eff338872ae73 SHA-256: f7c5ccdb1e109e82297ae92be7fec1ee08d3d85948f49fcc965c9e0505483e4a
120 Risk Score

Malware Insights

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

The PDF contains a heuristic match for a malicious redirector link pointing to 'ttraff.ru'. This URL is presented to the user as a tool to 'write text on pdf adobe reader'. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=write+text+on+pdf+adobe+reader
    • http://files.ulclcy.org/uploads/1/3/1/3/131381259/vovadi.pdf
    • http://files.staceyherreraphotography.com/uploads/1/3/1/0/131070202/1f280c.pdf
    • http://files.danielkathalynas.com/uploads/1/3/1/8/131857284/vuludikuj-wibidotaborese-timubavokeb-bimesape.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/chuyn_file_sang_file_nh_cht_lng_cao.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/14331835329.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/aldoses_vs_ketoses.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4568/files/mathematics_syllabus_d_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/50534279093.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3973/files/pofixigivarozan.pdf
    • https://cdn.shopify.com/s/files/1/0432/8787/1646/files/rirezogunab.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/52696073599.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/dotojumotefi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1288/0541/files/ccna_book_todd_lammle.pdf
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/sagavofirulesisa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/angiotensin_converting_enzyme_inhibitors_davis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0269/1743/files/volovedubafusojupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3804/files/sijigurevamakizusun.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/anoxygenic_photosynthetic_bacteria.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007092.bin
52202a6adf12b5f113480f3a872652dccde4541bb10da94ff4888e33c245e074
pdf-font-stream PDF embedded font (sfnt) at offset 0x7092 4832 bytes
font_01_sfnt_off00008110.bin
a0f94ece76df6f8a41a1686bf0ce62878c201c0bd9621407c882cce5c9e434e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8110 10188 bytes
font_02_sfnt_off0000a3e1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E1 4324 bytes