Malicious PDF — malware analysis report

Static analysis result for SHA-256 a250cf5b1a8c84e7…

MALICIOUS

PDF

53.8 KB Created: 2020-08-15 03:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63360f2eaff5e3de8edec7c9753d174f SHA-1: de551015b6431578d11c51f8a3b607da6cf948c8 SHA-256: a250cf5b1a8c84e7eff1616f3eec8d540b29b064b243270158e239ef564668b5
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though heavily obfuscated, contains URLs that are part of a link farm, with one specifically pointing to a redirector. This suggests the primary goal is to redirect the user to a malicious site, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=pdf+ant+colony+optimization+ppt
    • http://files.lifestageusa.com/uploads/1/3/1/3/131398135/zisutodixejukika.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/85852706664.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/bank_branch_manager_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/20794383595.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/que_es_preeclampsia_en_el_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/bapikojipivav.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/dixivufepimajikalilizesu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9036/8929/files/95305654668.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/51342836348.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0443/0469/5452/files/64819323567.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_off000073d7.bin
181c7767b03e97d23c4884adb2243c47e895708c7b16ea1737fdfa3adb780044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D7 2268 bytes
font_01_sfnt_off00007e03.bin
1c6b1ec8e2d038944816e1327f24952ad85cbcee911695a9c48e2f3d886ca21e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E03 4852 bytes
font_02_sfnt_off00008e73.bin
c376dd799348ab9043a02458266dfbb7e27a77e772d0068a6afcc7f3bc360b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E73 14728 bytes
font_03_sfnt_off0000bc1d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1D 4324 bytes

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