Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a7daa741941199…

MALICIOUS

PDF

46.2 KB Created: 2020-08-04 21:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c1e44bf7c4be744e61847403d5fa8b8 SHA-1: 7308736f20af17782cc694ed533f9b4788b0dc2b SHA-256: 22a7daa741941199fc52e12ee4ef8494675b8725bce1648e33e9d5192a803ac6
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, indicative of a link farm. One critical heuristic identified a direct link to a known malicious redirector, ttraff.ru, which is further obfuscated by a keyword search parameter. The document body, though heavily corrupted, contains text related to a Bosch fridge freezer manual and urgency lures, suggesting a social engineering pretext to encourage link clicks. The primary malicious URL identified is https://ttraff.ru/pify?keyword=bosch+fridge+freezer+manual+pdf.

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=bosch+fridge+freezer+manual+pdf
    • http://files.nettiesonline.com/uploads/1/3/0/9/130969472/dccddbf.pdf
    • http://files.worldwide-idls.com/uploads/1/3/0/8/130873921/nadumepalukesel.pdf
    • http://files.sheiladavis.ca/uploads/1/3/0/7/130776481/c9e448.pdf
    • http://files.fireprotect.me.uk/uploads/1/3/1/6/131606694/914d628b0.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/fajatedekopafofeva.pdf
    • https://cdn.shopify.com/s/files/1/0437/7713/0647/files/john_deere_345_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/xejerutojitamipodukunapip.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/95317273131.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/xekajod.pdf
    • https://cdn.shopify.com/s/files/1/0440/6801/2182/files/kirepirojiluda.pdf
    • https://cdn.shopify.com/s/files/1/0432/9675/1771/files/52878688330.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/46267068741.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/wazaxojugorav.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/34694023672.pdf
    • https://cdn.shopify.com/s/files/1/0434/3398/4161/files/wasapitadusuworemetofoxow.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_off0000760e.bin
8c821dcbfe083521f6ed499c33389108ae4a61fca436dcece28f0aa3bf973a29
pdf-font-stream PDF embedded font (sfnt) at offset 0x760E 5668 bytes
font_01_sfnt_off00008939.bin
6e7efd93a3c5bacdacb1ac36d2bbafbdeec3bbe12d272f6c0d5f240dd3bceb4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8939 10272 bytes