Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b957f2f2d56e64b…

MALICIOUS

PDF

50.2 KB Created: 2020-09-01 00:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e206b903636bf1f2b79904792212717 SHA-1: 1c14cdbc7710aa35b0361639406e0ce30b1a2029 SHA-256: 2b957f2f2d56e64b3c26fdce764689707f864c37763805baf0ba717ed74286f0
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. One critical heuristic firing identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a movie download, which is then followed by the malicious redirector URL and numerous other PDF 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/wix?keyword=byomkesh+phire+elo+full+movie++free
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/loseziraxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2476/0488/files/94122015286.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0462/2758/7223/files/malaria_parasite_test.pdf
    • https://static.usrfiles.com/ugd/3be3a7_29669d4084f24bc0b460770ef1855859.pdf
    • https://static.usrfiles.com/ugd/67e251_4bfd86ab007c4300a2441cbcbd7f260b.pdf
    • https://static.usrfiles.com/ugd/b6edda_5945bc59c88f45c19b5039c7cf9e86eb.pdf
    • https://static.usrfiles.com/ugd/16a96a_7f94f3b1fd0644839bb5f5b839439670.pdf
    • https://static.usrfiles.com/ugd/79e0dc_1bb53ae11b2d4cafa4b5f52cd57e9a5a.pdf
    • https://static.usrfiles.com/ugd/b27199_3229f7d3dcee4d8d8ba33834115672c7.pdf
    • https://static.usrfiles.com/ugd/4b7290_5d682d268a2146e4bb6a03172fdcbc35.pdf
    • https://static.usrfiles.com/ugd/735189_9a25bd13a19b4ee0bfbf049ccca72855.pdf
    • https://static.usrfiles.com/ugd/8ba634_1709d996b6384af4b8249191ea81b72e.pdf
    • https://static.usrfiles.com/ugd/3615fb_effe855373c84be89215d37c40bf810d.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_off00005d9f.bin
797bb7e8ee52d2f27f2abaffd8df26c18f9af6837a03473221e6ca0c3d9d0a0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9F 11536 bytes
font_01_sfnt_off0000830b.bin
b3390af0a7612c6aed4e5a26fa877a982472320be341d4f7816beb4e53bfe7a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x830B 5208 bytes
font_02_sfnt_off000094ac.bin
ad7f99dc1caf29a1711e8b48303b6b22a9de97aafa3c9ae1ecffcca30d19d027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94AC 10876 bytes

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