Malicious PDF — malware analysis report

Static analysis result for SHA-256 87192204cb121770…

MALICIOUS

PDF

45.9 KB Created: 2020-08-29 09:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2c314b752148f18bcd4508e05526de1 SHA-1: 7ed7946b8957aa11636b39a5a4f6603ee9bce1f8 SHA-256: 87192204cb1217704f74069b86cbba6ce9d1f16986fd9f9847df356ea48e2075
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=pc+suite+nokia+lumia', which is likely intended to trick users into downloading malware by posing as a legitimate software update or utility.

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.com/wix?keyword=pc+suite+nokia+lumia
    • https://cdn.shopify.com/s/files/1/0436/9373/6089/files/kivusukilukibejagebanufoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/5529/0270/files/adding_and_subtracting_integers_word_problems.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/pezepabafawumuvefetafag.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/kalep.pdf
    • https://cdn.shopify.com/s/files/1/0436/2544/7587/files/govewijebo.pdf
    • https://static.usrfiles.com/ugd/b8c837_581ea006585b4ab29b69a9eaba43713e.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b5fbe4786ef4768a4884f1ebd64282f.pdf
    • https://static.usrfiles.com/ugd/b8c837_07bf446aba03453682d2e171b39dd8cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_e18be7dba63443988718a581c1cb01d7.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1580/files/popeweterujufafokuxuwufof.pdf
    • https://cdn.shopify.com/s/files/1/0467/7373/1481/files/fibezivejop.pdf
    • https://cdn.shopify.com/s/files/1/0464/1783/8248/files/barad_meeting_the_universe_halfway.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/metabolismo_c3_c4_y_cam.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/84252064324.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/45351122867.pdf
    • https://cdn.shopify.com/s/files/1/0451/2717/2250/files/artificial_intelligence_book_by_deepak_khemani.pdf
    • https://cdn.shopify.com/s/files/1/0459/5423/6575/files/right_hemicolectomy_diet_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/wotasuxelakefab.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
stream_003_off00006841.bin
fb091be3cbeb870b27d9c76017dd5cb61238d931ac89257e56b2b0e187cce431
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6841 4916 bytes
font_01_sfnt_off000078e5.bin
e92531871fb6da6643010cc627fcb58b5adf3f41b74a28a5273b327d8cdff4b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E5 18752 bytes