Malicious PDF — malware analysis report

Static analysis result for SHA-256 d542cbff996ef441…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 03:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d60afe4c03933fa3bc85a9b90d39f1d SHA-1: 7dd42832e4f034c3fbd4072725136a4f79f37c70 SHA-256: d542cbff996ef44148e88fe7aa978fc62ba0245d385699bbc73f9c462874b313
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are SEO-themed lures for PDF downloads. One prominent link, 'https://ttraff.cc/pify?keyword=mathematics+2+book+pdf+download', is identified as a malicious redirector. This indicates the document's primary purpose is to trick users into visiting malicious sites under the guise of providing PDF 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.cc/pify?keyword=mathematics+2+book+pdf+download
    • http://files.victoriamartinphotography.co.uk/uploads/1/3/1/1/131163872/zirivi.pdf
    • http://files.jennybacon.co.uk/uploads/1/3/0/7/130739719/278b29a6f.pdf
    • http://files.joyofchristpress.com/uploads/1/3/0/7/130739831/0bd10c784.pdf
    • https://cdn.shopify.com/s/files/1/0433/5095/0041/files/dojewu.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/low_back_pain_exercises_for_elderly.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/11729180812.pdf
    • https://cdn.shopify.com/s/files/1/0434/0246/1351/files/pozar_microwave_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/9121253757.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7457/files/94122121050.pdf
    • https://cdn.shopify.com/s/files/1/0437/2715/9448/files/affichage_obligatoire_restaurant.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/tinemosotebalezazuposades.pdf
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/5379124820.pdf
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/48515338163.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/panoratizebevow.pdf
    • https://cdn.shopify.com/s/files/1/0447/8880/9879/files/talking_as_fast_as_i_can_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0434/8503/6708/files/cryotherapy_physical_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0431/3038/8642/files/32710644052.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dc9.bin
54a10400d8d9746f7d635901a988a6738b90e9e2d0141e41cb36d457773262b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 1840 bytes
font_01_sfnt_off000066c9.bin
a4e4eb2056e12f7242423bf366fe140d8f780b4ca70403a5d0d3faa7e8fa2005
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C9 5732 bytes
font_02_sfnt_off00007a47.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A47 2116 bytes
font_03_sfnt_off00008411.bin
d429f3ecdad5849cb5e22492ae5f1f0ece6c51a4db262dc7500ef0cea1a8646c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8411 10148 bytes