Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd79ecaa5b2f7323…

MALICIOUS

PDF

43.8 KB Created: 2020-09-08 20:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1650c1af945147ad64bab04afe3eaff SHA-1: 1e14090f5db3a400273f0cea76fdef725e48c6ea SHA-256: fd79ecaa5b2f7323cb87a913dfcd5d8f50cdec3c1526b4cab21b16b609383fd3
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.me, which is disguised as an 'audit report sample ppt'. This indicates a phishing or social engineering attempt to lure the user to a malicious site. The file also contains a large number of embedded links, many pointing to shopify.com, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of a malicious redirector and the 'download button' heuristic suggest a delivery mechanism for further malware.

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.me/pify?keyword=audit+report+sample+ppt
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/tuxolefuso.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/xevoduxodibenixovet.pdf
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/baptism_of_the_holy_spirit_verses.pdf
    • https://static.usrfiles.com/ugd/0d9a50_a1346191b7f743238e4dbfbe5ba89a40.pdf
    • https://static.usrfiles.com/ugd/55f640_859997e350464d5ca0a8e9b1b0e6cd0e.pdf
    • https://static.usrfiles.com/ugd/9b5f63_3a5d1ae11d114a2187111449e39ee164.pdf
    • https://static.usrfiles.com/ugd/b8c837_57257998a08b467a99a3d299716ccfb2.pdf
    • https://static.usrfiles.com/ugd/b42fd6_8729010026604cf0b22eac644e0fd5ee.pdf
    • https://static.usrfiles.com/ugd/2074c9_ed0a4a341415492188f41039fc69d029.pdf
    • https://static.usrfiles.com/ugd/2d797c_f0e28ed18b0b4d0193ece13ad5c1853a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/application_letter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/ethnographic_research_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6102/files/assessing_listening_gary_buck.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_off000061a5.bin
25b461882d5356361563ea176d1858eef4e10fe0f32e538d6507ef3eb4ee27c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A5 4868 bytes
font_01_sfnt_off0000722d.bin
1aea52057fa6584b8ef1cc3d0ed355c4c8f5577da4a0bb1c88682fe10b3373e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x722D 10184 bytes
font_02_sfnt_off000094ca.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x94CA 4324 bytes