Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea52491c565587a…

MALICIOUS

PDF

43.8 KB Created: 2020-08-30 21:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 836b0fa8906cb5fccae4b18e840a5cda SHA-1: cb715b881a64c35ba5447b6d4eababe82169a8e6 SHA-256: 1ea52491c565587a69058864e21a61ce455bad26ba972431cc88c28bb2eb4e65
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=nizhi+tt+028+user+manual'. This URL is embedded within the document body, alongside numerous other links hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The presence of a 'download button' heuristic further supports the lure of clicking the malicious link. No scripts were extracted, and the document body is heavily obfuscated, but the primary attack vector appears to be a redirect to malicious infrastructure.

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/wix?keyword=nizhi+tt+028+user+manual
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/31161224991.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/wabiriji.pdf
    • https://cdn.shopify.com/s/files/1/0435/4218/4095/files/cbse_class_11_computer_science_syllabus_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0433/6025/6159/files/formal_business_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9066/files/94330551708.pdf
    • https://cdn.shopify.com/s/files/1/0437/1401/9496/files/jozigimexizuful.pdf
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/69653223724.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/suzivirelerosizul.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/sonabawewefo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/wifepigazawemujew.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/rosilazozerufine.pdf
    • https://static.usrfiles.com/ugd/b8c837_5428e0bdcff242df9558c1964139c32d.pdf
    • https://static.usrfiles.com/ugd/3e5d97_404bd91babd64f9581fca4031db8b2a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_57d564a4fd134b08b55684e92cca70d1.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_off00006a79.bin
e77ed0d1c1cb6f0dfaebd4c5ce238ca4efa90a51eb8694a4d30e93c2203cf3f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A79 5412 bytes
font_01_sfnt_off00007cbd.bin
1d5779285d0fb7fc09b44cd66441e84c1e69281a5928f5862a654910664795c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBD 11216 bytes