Malicious PDF — malware analysis report

Static analysis result for SHA-256 873a784c014feefe…

MALICIOUS

PDF

38.0 KB Created: 2020-09-19 21:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 411e19c6c8fe8233bff94d776d4ccd72 SHA-1: 066d2d74cac4637fdf80784eafe3ed81a5ba5e65 SHA-256: 873a784c014feefe1790d0c3b2daa5a9fa733ac4eb424f3ad4581e65f8e8006a
128 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'Bosch classixx dishwasher manual pdf' and includes the malicious redirector URL, indicating a lure to disguise the malicious intent. No scripts were extracted from this sample.

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.link/wix?keyword=bosch+classixx+dishwasher+manual+pdf
    • http://niwigatow.enlightenators.com/uploads/1/3/2/7/132741073/7490336.pdf
    • http://letaba.mplxweb.com/uploads/1/3/0/7/130775320/mesupalid-bugoruf-runop.pdf
    • http://files.homelessaware.org/uploads/1/3/2/6/132681579/0fbcdd7dda96.pdf
    • http://files.yahshuauniversity.com/uploads/1/3/0/7/130740112/jikupelibufamijaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5057/3724/files/dark_shell_lust_in_the_cage.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2893/files/intersection_of_line_and_plane.pdf
    • https://cdn.shopify.com/s/files/1/0432/2089/3851/files/vogoxewokidut.pdf
    • https://cdn.shopify.com/s/files/1/0438/1641/9488/files/apologetica_catolica_purgatorio.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/star_wars_droid_inventor_kit_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/myers_9th_edition_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/57648300728.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/71875176143.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/vujuje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/17305088143.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_off0000497d.bin
9083961f58f59d3c182ee35a5ab9d8ee1a9df3793eef60a92401141608541265
pdf-font-stream PDF embedded font (sfnt) at offset 0x497D 5408 bytes
font_01_sfnt_off00005bbe.bin
f2b90fd55a76d7dc87f6e80341a4d2f6c16d4979200298341dad3a6bd5039b9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBE 9740 bytes
font_02_sfnt_off00007d13.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D13 4324 bytes