Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cf8b521f53cb74…

MALICIOUS

PDF

47.8 KB Created: 2020-09-04 01:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a09bd5e07ef688e0a73767bf71df6f8 SHA-1: b401df98e9774496a2f7ca1c3da3029ecea57fdd SHA-256: a1cf8b521f53cb7410af3492359a5cab7b92ffa9997fad8452be9796a99ac2e0
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=craftsman+electric+chainsaw+manual', is designed to lure users into clicking it under the guise of downloading a manual. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to host further malicious content.

Heuristics 3

  • 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.
  • 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.link/wix?keyword=craftsman+electric+chainsaw+manual
    • https://static.usrfiles.com/ugd/67f5f7_01a4af0c4ff24805b5f780abad772637.pdf
    • https://static.usrfiles.com/ugd/6da380_1b24badbc0e446fdb1875a2e0376a891.pdf
    • https://static.usrfiles.com/ugd/585b1d_db3cf377ad0b4d8387184293d994c0f7.pdf
    • https://static.usrfiles.com/ugd/145364_3abca91587d04a0bbc2a60362b6f3e7f.pdf
    • https://cdn.shopify.com/s/files/1/0436/2423/5170/files/fiwizetipojaserozilo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2979/7787/files/xakujufafuzivumarigepex.pdf
    • https://cdn.shopify.com/s/files/1/0460/0207/7855/files/senelimekirizerozenovowi.pdf
    • https://cdn.shopify.com/s/files/1/0461/9282/0382/files/elco_thision_s_test.pdf
    • https://cdn.shopify.com/s/files/1/0439/3975/8235/files/xovafexide.pdf
    • https://cdn.shopify.com/s/files/1/0463/3093/7506/files/pifiwekunemad.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1903/files/fajetawigokegameguvo.pdf
    • https://cdn.shopify.com/s/files/1/0447/2566/5945/files/the_new_real_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/62578043069.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8447/files/sunimuxoperadajeto.pdf
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/73234084503.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_off0000704e.bin
4f9f57a837c02609cd06422dd65978b0a5e704c39f3beff9e43c1a5b32399a69
pdf-font-stream PDF embedded font (sfnt) at offset 0x704E 5008 bytes
font_01_sfnt_off00008132.bin
38a9d5ef843e06a8cbd213d3d9f8616b9d239dd77146e15b758fea7eeb1d53f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8132 10196 bytes
font_02_sfnt_off0000a413.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA413 4324 bytes