Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d76002f31a9867…

MALICIOUS

PDF

53.2 KB Created: 2020-08-21 02:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5e4bee7b4d6e4af831ebd02a3674a90 SHA-1: 6772cf09ff9be62182351ab9b7541e58cd381d31 SHA-256: d8d76002f31a9867101bf4b6d619b6cfe1e39eb2278a43ff9aeb66ea5ae8944a
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=awd+manual+transmission+cars+2018'. The document body, though heavily corrupted, contains fragments of this URL and mentions 'awd manual transmission cars 2018', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation or to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=awd+manual+transmission+cars+2018
    • http://files.courtroomlawnc.com/uploads/1/3/2/7/132740580/nepofosejo.pdf
    • http://files.jarettfajardo.com/uploads/1/3/1/3/131379622/zowafowofafe_xogoja.pdf
    • http://files.blaine-bacchiocchi.com/uploads/1/3/2/6/132696263/3028133.pdf
    • http://resora.recrates.co/uploads/1/3/1/3/131381679/rowezovefomo_ledapofi_jerukedawur_fegosefupaxi.pdf
    • http://files.coregenicconstruction.co.uk/uploads/1/3/1/6/131637218/6a28fc0db9.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/ximagebevimes.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/59142086316.pdf
    • https://cdn.shopify.com/s/files/1/0450/4194/2678/files/godsmack_go_away.pdf
    • https://cdn.shopify.com/s/files/1/0434/2258/0886/files/68724692088.pdf
    • https://cdn.shopify.com/s/files/1/0433/8820/7254/files/93544132325.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/jafuwifosoropukobawevigi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0329/5382/files/zuvukurotagix.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/21665136246.pdf
    • https://cdn.shopify.com/s/files/1/0433/9345/0134/files/26288192096.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29318048561.pdf
    • https://cdn.shopify.com/s/files/1/0428/8013/9423/files/94288820247.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5973/files/gamipigabume.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/51360941601.pdf
    • https://cdn.shopify.com/s/files/1/0430/6318/1473/files/medical_laboratory_technician.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090a6.bin
56ad342ffe95967b00d237152fe52575cff2aa17f2ba2cf8a1d37aef0709d177		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90A6 5688 bytes
font_01_sfnt_off0000a3f0.bin
20142d89e88fed0c2943776db39f8ca6cba6bd10bc3e3a46f5937d37a341446d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3F0 10428 bytes

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