Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b156a1d79c72e7…

MALICIOUS

PDF

54.1 KB Created: 2020-08-06 22:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e557c1aa10f6b1421af669de3021985 SHA-1: 1917843da08c528dfbbac3752127764c4586fc36 SHA-256: a9b156a1d79c72e73c1a2beb1c7b49a13ef20e3517c74e003da53af053f288b8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=agenda+21+pdf+free+download'. The document body, though heavily obfuscated, contains text related to 'Agenda 21 pdf free download', suggesting a lure to entice users to click on the malicious links. No scripts were extracted from this sample.

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=agenda+21+pdf+free+download
    • http://files.atjsbc.com/uploads/1/3/1/1/131164239/8f941fb98.pdf
    • http://files.eringreenauthor.co.uk/uploads/1/3/0/7/130776096/c26e8.pdf
    • http://files.meredithroadrep.com/uploads/1/3/0/7/130740586/foxunasibeja_soxoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1125/files/79263305881.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/pulaxebuwulaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7249/files/82111763341.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27347714529.pdf
    • https://cdn.shopify.com/s/files/1/0447/4788/2650/files/beginners_guide_to_photography.pdf
    • https://cdn.shopify.com/s/files/1/0435/0436/9816/files/xixibukasewaseruxowiwagev.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/42608212879.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bizem.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/45278210562.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/luzakovewavofifarexi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6667/7665/files/4969725061.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_off000073c7.bin
be272d4d23880071a7c5f82edf59a9d807dcfffeb2b659f30fd9e57fe49bae63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C7 5296 bytes
font_01_sfnt_off000085ef.bin
297f52f4236f09ba58e85c0251406db64a4d3221d73012e717b108c12409d6fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85EF 2576 bytes
font_02_sfnt_off00008fae.bin
d2b470db9e8947619f4182c5d0c8837bc0ded141b3631adff675ac51ad491216		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAE 10276 bytes
font_03_sfnt_off0000b2ef.bin
68360d215686b7ffd363eeb0253592cf4566abf286d77cfdfbfe23f63f7602e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2EF 16780 bytes

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