Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f85bd546aaaa17…

MALICIOUS

PDF

39.0 KB Created: 2020-08-13 03:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d6120929e7d623cfca35cd03caf6f05 SHA-1: bacb7ad1f5e2f944b44a8e50c975de4cda62c873 SHA-256: 42f85bd546aaaa17bd9e4b6db666b6171ee2d8aab96f85a0e287a6deacd43fe4
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL. The presence of a "download button" heuristic further suggests a lure to trick the user into clicking the malicious link. The primary malicious IOC is the redirector URL, which likely leads to further stages of an attack.

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.cc/pify?keyword=sensors+actuators+and+interface+electronics+pdf
    • http://files.projectufo.org/uploads/1/3/0/7/130739381/4877757.pdf
    • http://dutarebed.grandmaraislions.com/uploads/1/3/0/9/130969360/010132.pdf
    • http://fimev.newjerseyspineandwellness.com/uploads/1/3/1/3/131380005/9613457.pdf
    • http://files.mca.school/uploads/1/3/0/8/130874347/8993391.pdf
    • http://files.gvai.org/uploads/1/3/1/4/131453917/dijad-kutajezogak-zomulam-bajomeriko.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/lord_narasimha_kavacham.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/81880630557.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/29253024879.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0746/files/74384229580.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/bujutixufuvogijefekow.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/87124701452.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/gidijabodasewu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/american_standard_furnace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/10077145583.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0951/files/95771923708.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_off000058e2.bin
74ef550a880145f401b34dbe8f6de4936a683503ae86330be18d82a912efc280
pdf-font-stream PDF embedded font (sfnt) at offset 0x58E2 5252 bytes
font_01_sfnt_off00006ac8.bin
6a792570fd05d72ecf451a06fc33890b6d25ef3fe3d36bd2569f0b589e2bd10d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC8 10856 bytes