Malicious PDF — malware analysis report

Static analysis result for SHA-256 39311dbf030a5471…

MALICIOUS

PDF

51.9 KB Created: 2020-08-08 20:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b0749a2a2467f65b360967f969f3e90 SHA-1: 78a242a9d8797f2b683ac96bfc69c0ee1b355407 SHA-256: 39311dbf030a54717cff9cae4b2e186b314ee574370b284d8f98398f86710c9e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to translation and the tool 'wkhtmltopdf', suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to manipulate search engine results or distribute content. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=translation%20urdu%20to%20english%20pdf
    • http://files.hiltonbell.com/uploads/1/3/1/4/131409463/1468fc675b7d833.pdf
    • http://files.atomic47jewelry.com/uploads/1/3/1/6/131637043/e6aa71383d2.pdf
    • http://files.nazbahtom.com/uploads/1/3/0/7/130740510/9595851.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/96729161650.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/82562328260.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/52586444311.pdf
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/joe_defranco.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/gikofopafop.pdf
    • https://cdn.shopify.com/s/files/1/0432/1955/0370/files/67339720710.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/49619637305.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9595/files/47677674632.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/how_to_write_arabic_letters.pdf
    • https://cdn.shopify.com/s/files/1/0446/0858/5891/files/2013_audi_a7_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/kodovisofuzexanesabenawe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/dewojuxolatigebuzov.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_off00006247.bin
9bd1b096ff9d05c91eeb6d1b141746ee83b38c139758c3154dfae33419d33ebb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6247 5136 bytes
font_01_sfnt_off000073b2.bin
49d73933027ab3245939ad0e7ec3b97211d3b1c6c6c81f44b1153adb56efbee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B2 10316 bytes
font_02_sfnt_off00009724.bin
2181903ed0cd6a25a4a8fe31915f08681d24417e243923f96fd74b513fc3ad37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9724 18476 bytes
font_03_sfnt_off0000b3f7.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F7 4324 bytes

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