Malicious PDF — malware analysis report

Static analysis result for SHA-256 40dc8c5f46e26298…

MALICIOUS

PDF

42.0 KB Created: 2020-08-02 20:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8384ffab0aa0ab65935c8ba2bd6469e2 SHA-1: 701b16c64142f6294bc3ac30a9af728c004b9369 SHA-256: 40dc8c5f46e262982b8ed13913b5a687bec12eb632a4534bf7401ec37139e1e6
120 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, with one heuristic specifically identifying it as a 'PDF_MALICIOUS_REDIRECTOR_LINK' pointing to 'https://ttraff.cc/pify?keyword=probability+by+pitman+pdf'. Another heuristic flags it as a 'PDF_SEO_LINK_FARM', indicating a mass of external links. The primary purpose appears to be redirecting users to potentially malicious content or for SEO manipulation, rather than delivering a direct payload within the PDF itself.

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.cc/pify?keyword=probability+by+pitman+pdf
    • http://files.silverswordgoldenretrievers.com/uploads/1/3/2/6/132681891/fuwiwu_zutadapibitu_sisulid.pdf
    • http://files.celebraterecoverycb.com/uploads/1/3/0/7/130775143/xuzasobafavad-zutovatovowatal.pdf
    • http://files.bremertonfoodline.org/uploads/1/3/0/8/130874046/2227031.pdf
    • http://files.circusgirl.co.uk/uploads/1/3/1/8/131856134/pijosa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/tenuzepesudelo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0409/0792/files/zazanowelalasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/72715282765.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/12728806420.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/narwhale_io_hacks.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/61662318077.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/bevenosupirivasojiliwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1932/7896/files/bidalirufufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/ladoviwegopobenewelarupel.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/pizoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4899/files/pavibinitebowifebol.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/14381714124.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_off00005e3f.bin
551f4ab4898f1e66685da61daf42826743e95790d0c0d32f168b00bd35a9bad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3F 5252 bytes
font_01_sfnt_off00007009.bin
d95aee2c100963dd5ca23ccbf8cf6ce2975a2e9c00d3de338c8688527614f029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7009 13792 bytes

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