Malicious PDF — malware analysis report

Static analysis result for SHA-256 57bd70aebad2f0ef…

MALICIOUS

PDF

34.1 KB Created: 2020-08-16 21:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7843e174053a9d51c4ca443403f353e SHA-1: 9f4d950ec4bddb14a74f982c6e5cd465c9b78d1b SHA-256: 57bd70aebad2f0ef5ad33683ea3d5dfde5df9ad4f926334b732028c6e176e6ad
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=cartoon+network+video'. The document body, though partially corrupted, includes text related to 'Cartoon network video', suggesting a lure to entice users to click the malicious link. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy to distribute the malicious payload.

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=cartoon+network+video
    • http://kesuv.cocreativ.com/uploads/1/3/1/4/131452836/vavebud.pdf
    • http://files.sfbaytherapistgroup.com/uploads/1/3/0/7/130740158/nebaziraweti.pdf
    • https://cdn.shopify.com/s/files/1/0454/8503/1576/files/guwegik.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/tizowinubipitedorig.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/zadarel.pdf
    • https://cdn.shopify.com/s/files/1/0439/4831/0683/files/wemeno.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/84642518856.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/fusuluvavoguje.pdf
    • https://cdn.shopify.com/s/files/1/0432/4383/1458/files/28787978769.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/jefubufopubor.pdf
    • https://cdn.shopify.com/s/files/1/0440/5883/7142/files/ccna_voice_portable_command_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/5159/5429/files/the_new_encyclopedia_of_modern_bodybuilding_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0429/0134/0319/files/8456250419.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/tetemudulavetu.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_off00003ff4.bin
871121aab86fd77cff6f60fe31ca1b21690164c4da872a7d9b89fb5cff276e57
pdf-font-stream PDF embedded font (sfnt) at offset 0x3FF4 4636 bytes
font_01_sfnt_off00004fdc.bin
c6f9ed316d988aac9cc873db4141a9cb30c3b804088fffc8cf0df23ddb905e21
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDC 8668 bytes
font_02_sfnt_off00006d8c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8C 4324 bytes