Malicious PDF — malware analysis report

Static analysis result for SHA-256 e591f5f7b2caa23f…

MALICIOUS

PDF

50.8 KB Created: 2020-08-12 20:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f750f8b7fc7eeabed8d837e058996162 SHA-1: 886a7af083ec6e50268c93846519129400c3799b SHA-256: e591f5f7b2caa23f6f49146d6b95cd23671e7b03c4d7c3aed1083444c1d58a6e
128 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a download for 'Lightroom keyboard shortcuts pdf'. This link points to ttraff.ru, which is known malicious infrastructure. The document also contains a large number of external PDF links, many hosted on Shopify, likely for SEO manipulation to improve search engine ranking for malicious content. The presence of a 'download button' heuristic further supports the lure. No scripts were extracted, but the primary attack vector is the malicious redirector.

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/pify?keyword=lightroom+keyboard+shortcuts+pdf
    • http://files.friendsofrenacer.com/uploads/1/3/0/7/130739227/b554e01ab.pdf
    • http://files.mexpup.com/uploads/1/3/0/8/130815381/wugenafapon-denutepibijan.pdf
    • http://files.beckyjonesart.com/uploads/1/3/2/6/132695915/menipupa_vexinilowawode.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/media_nutrient_agar_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0430/2641/5779/files/python_dictionary_with_multiple_values.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/26411772187.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/bufebakatu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/46294752310.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/intertherm_water_heater.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/60222038051.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/hive_commands.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/87899189988.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/1983_honda_shadow.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_off00006eed.bin
35d5db24f70e5980b360107ed9661f384de7feac3a51f2cbba7ff55df9614fff
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EED 5784 bytes
font_01_sfnt_off0000828e.bin
6a84d3699e1320c08705c2c2e036f83a4b11d6ef7b1d5b50c853e9a0b2c29f34
pdf-font-stream PDF embedded font (sfnt) at offset 0x828E 10420 bytes
font_02_sfnt_off0000a65d.bin
e2ffbbc5bf6c0928b9f03c3b463746bfb576a8938676bcf21b024e35877a1a65
pdf-font-stream PDF embedded font (sfnt) at offset 0xA65D 16940 bytes