Malicious PDF — malware analysis report

Static analysis result for SHA-256 81951aa9fcc414e5…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 22:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0017e82277ff08faf9a71c0edd64548 SHA-1: caa14db252d84435cb71b2b944a6e8e993975a41 SHA-256: 81951aa9fcc414e56f438f7fc12024cde9407a23ceaf281a80dcbb45bc26b04b
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a lure for 'Netacad chapter 10 exam answers' and embeds a link to a redirector at 'ttraff.cc'. This redirector is likely used to obscure the final destination, which could be a phishing site or malware download. The document also contains a large number of embedded links, many pointing to Shopify, suggesting an attempt to blend in or leverage legitimate platforms for hosting. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may also attempt to solicit sensitive information.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=netacad+chapter+10+exam+answers+5.+0
    • http://files.stampstation.com.au/uploads/1/3/1/6/131607404/6eebd.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/veluxowoxulawulipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/wto_anti_dumping_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0433/8004/8037/files/62722193813.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/algorithmic_trading_module.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8440/files/lunodoxupuxuwodivubim.pdf
    • https://cdn.shopify.com/s/files/1/0436/6044/3813/files/electric_guitar_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/binding_of_isaac_how_to_drop_trinkets.pdf
    • https://cdn.shopify.com/s/files/1/0429/3689/3599/files/6725432351.pdf
    • https://cdn.shopify.com/s/files/1/0463/2448/2208/files/masemukatajuzifitera.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5265/files/biographies_of_great_leaders.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8276/files/6853501521.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/45848007215.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_off000060f5.bin
646d372cb678329a395b1a62a5d290f2a39f8f475ab91eb15b9923f18c68cdd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F5 5392 bytes
font_01_sfnt_off0000733b.bin
822970370a42f4b64c630c125cd591a9540b4dd9a3b8ca8b117c73aa20b89dec
pdf-font-stream PDF embedded font (sfnt) at offset 0x733B 10032 bytes
font_02_sfnt_off00009588.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9588 4324 bytes