Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4109e803242ce1c…

MALICIOUS

PDF

51.7 KB Created: 2020-08-16 15:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 791515ce67a674b2fc57fb54847758c1 SHA-1: c7288360ae2591755c3a2da395da0a30e7a08096 SHA-256: a4109e803242ce1ce586a5bc33f205cdc04b7fa6aca3f8b4a34a75ab5b11a4ee
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the URL https://ttraff.ru/pify?keyword=mother%2527+s+day+letter+writing+template is associated with malicious activity. Additionally, the 'PDF_SEO_LINK_FARM' heuristic points to a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body, though partially corrupted, contains text related to a 'mother's day letter writing template', likely a lure to encourage clicks on the malicious links.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=mother%2527+s+day+letter+writing+template
    • http://files.hendersonbrothers.ca/uploads/1/3/0/7/130775172/3896565.pdf
    • http://files.walleycreeknanaimo.org/uploads/1/3/0/7/130775413/7984327.pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • http://files.aican.ca/uploads/1/3/1/0/131070317/vulukewogasivus.pdf
    • https://cdn.shopify.com/s/files/1/0439/0181/2904/files/shania_twain_forever_and_always.pdf
    • https://cdn.shopify.com/s/files/1/0428/2194/3463/files/5_team_single_elimination_bracket.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/zafilep.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/gajesipoku.pdf
    • https://cdn.shopify.com/s/files/1/0437/0992/3480/files/30494546319.pdf
    • https://cdn.shopify.com/s/files/1/0428/4540/5350/files/bowupejusumodim.pdf
    • https://cdn.shopify.com/s/files/1/0435/4103/7208/files/bsnes_emulator_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/nokoraxapolomogod.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/gatotkaca_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0440/0254/1726/files/25516627585.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/67094667876.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/kugave.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_off00008a32.bin
539a5903a454c0ae30cac47731907f2072caf183da5f8b1cf3bdfd5315de38bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A32 5608 bytes
font_01_sfnt_off00009d48.bin
e5e045db01c5276ab1f43fe4d6728e0ab6e316cfa642fa269c4d4d3cb8c9e6a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D48 10628 bytes