Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fda1f3d2264ee29…

MALICIOUS

PDF

38.0 KB Created: 2020-08-23 09:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c7ddccd652b4427224419d547a8aebe SHA-1: b520f50b7f9ce6dfa003cef7d6e3b59f9ad30c43 SHA-256: 9fda1f3d2264ee297757d2e6e061f3a6c0645dbeec1d1ac424d25d3f7695cd06
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=oxford+ib+diploma+biology+textbook+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file's purpose appears to be to drive traffic to this malicious redirector, likely as part of a larger phishing or malware distribution scheme.

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.ru/pify?keyword=oxford+ib+diploma+biology+textbook+pdf
    • http://vepujen.ukirkolemiss.org/uploads/1/3/1/3/131384281/beluterut-xolopigow.pdf
    • http://files.bdwponds.org/uploads/1/3/1/3/131398449/kurovedojuwose.pdf
    • http://mevisal.citycandy.co/uploads/1/3/2/6/132681556/151996.pdf
    • http://files.kindanimalservices.com/uploads/1/3/0/7/130738875/9369181.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/kibavabusodudusepekuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/wogagedasurowiso.pdf
    • https://cdn.shopify.com/s/files/1/0430/0531/3177/files/92978775055.pdf
    • https://cdn.shopify.com/s/files/1/0433/8106/3838/files/rekakede.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1338/files/reading_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/2887/3367/files/time_management_made_simple_brian_tracy.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1997/files/82147987088.pdf
    • https://cdn.shopify.com/s/files/1/0431/8262/0834/files/58055646743.pdf
    • https://cdn.shopify.com/s/files/1/0434/3595/0241/files/tipos_de_raquitismo.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_off000055c1.bin
631a75ac2db0fba4ef85a93d719a6c44175db07001acdb410ed737ac3fe25ffa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C1 5584 bytes
font_01_sfnt_off000068b4.bin
6dedc30480084172231d518fb010a96331a01846fcb1acf14399bf4897928833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B4 10160 bytes

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