Malicious PDF — malware analysis report

Static analysis result for SHA-256 431c04f30cbda416…

MALICIOUS

PDF

64.1 KB Created: 2020-08-18 13:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f9e5011541a015d7660eaa20ee87034 SHA-1: adf9c8a253bfed8935142ab539f961853b182c2f SHA-256: 431c04f30cbda416ff47c61a7c5722079f4ca78719d58e1507288dea5c3b4982
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'cheat sheet'. This URL redirects to a malicious domain, suggesting the document's primary purpose is to redirect users to malicious content. 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=capsim+capstone+cheat+sheet
    • http://files.melaniedaylelauren.com/uploads/1/3/2/6/132681281/lexula.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/soul_food_season_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/juwajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/wiziloluborap.pdf
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/aluminium_extrusion_design_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/salizifabijofe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/dajag.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/neluveraximarajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4258/6269/files/47363351017.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/functional_requirements_for_library_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/6092/8405/files/dodureti.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/boss_rc_3_manual.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_off0000af4d.bin
28e7c4232508aa149f31b17d69f39eb450e6a0b7b15d3f26accf011f847f010a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4D 4856 bytes
font_01_sfnt_off0000bf9e.bin
720c57f994d8f5eb87b0960fff9996379b2f1328b99b711c368f363d5b510d80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9E 11164 bytes
font_02_sfnt_off0000e590.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 4324 bytes

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