Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60cee1e936a9766…

MALICIOUS

PDF

59.1 KB Created: 2020-08-12 13:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 193350d4d59cfb06b17462de9aa8a820 SHA-1: be157bded6c8a1be8d218304157bdd1b506b354f SHA-256: a60cee1e936a97665bb0da7c2adf6b6513a4a45b82c3414a71aad9b6ee0dc999
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at `ttraff.ru`. The document body, though heavily obfuscated, contains text referencing 'Wondershare pdfelement ocr plugin crack' and the wkhtmltopdf application, suggesting a lure to download cracked software. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=wondershare+pdfelement+ocr+plugin+crack
    • http://files.ahsra.net/uploads/1/3/2/6/132681992/kupunesanu.pdf
    • http://zajid.sharadslunchbox.com/uploads/1/3/1/4/131452883/puvaro.pdf
    • http://wekefup.jaytotha3.com/uploads/1/3/2/6/132680813/6924551.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/60809110577.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0429/2060/7900/files/nulojogiwideje.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/xenowowisikekonupuxokaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/3573/5717/files/xoxefu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6539/0757/files/89755384072.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1655/files/37577484951.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/aircraft_aerodynamic_design.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/vokobapirapaxilosalatif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixiridujafogidubiba.pdf
    • https://cdn.shopify.com/s/files/1/0445/8260/0868/files/72216503555.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/alcoholismo_en_adolescentes_causas.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_off00007b7a.bin
f96a077d8daec0afe603183f5908cb122bd82db16ccc5d888b45abbb4490dd84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7A 5112 bytes
font_01_sfnt_off00008d28.bin
daf495d5c5b6a957bb7b57818e301ca131ba382b5b8970822a65abbdf9c8b452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D28 5528 bytes
font_02_sfnt_off00009fd0.bin
ad5f60d5edd59ec206cd718e1ec2e5fe752b52ec1250da6e4c66c94d56bcae45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD0 15564 bytes
font_03_sfnt_off0000d104.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD104 4324 bytes

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