Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d5be12de5ad14f…

MALICIOUS

PDF

48.5 KB Created: 2020-08-20 08:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c2ff1c9046704ce78ba640b1e704a8a SHA-1: 3fc0ef9b196dd85ecc6b7347003ea71b2e9d3e50 SHA-256: 09d5be12de5ad14f0c6986d3b9b3502b5de322fbb8a1e83fbfc72dc3dcc9d226
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to medical conditions, likely to trick users into clicking the malicious links. The presence of a link farm heuristic further supports the malicious intent of distributing links to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=chiari+malformation+decompression+icd+10
    • http://sijudov.x-raymusic.net/uploads/1/3/0/7/130738680/8160612.pdf
    • http://files.dopesickdotcom.com/uploads/1/3/0/7/130776406/lavijiwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/0433/6027/files/butuveturovumakogefu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2180/2392/files/cadette_comparison_shopping_badge_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/vulesafopoxapodibefez.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/dejakemesowagitenawinus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/7118020669.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/59365091296.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/rokigowameru.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/wupifitagodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9177/9999/files/14967420614.pdf
    • https://cdn.shopify.com/s/files/1/0446/3286/6979/files/waltz_for_debby_cannonball_adderley.pdf
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/75318601730.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/vabawu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006711.bin
ecf738a73c67272abbfe0acef1d677abc8ccd37a967038cdc53adb95c5060175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6711 5400 bytes
font_01_sfnt_off00007947.bin
e41a71e5df1d24df8111faf818cb790849486059d566a79d57f8df32632eaff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7947 14652 bytes
font_02_sfnt_off0000a71d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71D 4324 bytes

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