Malicious PDF — malware analysis report

Static analysis result for SHA-256 9023ddad7ebae5dc…

MALICIOUS

PDF

39.3 KB Created: 2020-08-01 11:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 687c5ec591a11e56ef413a0b9deac11d SHA-1: ecb53fa8ac3d8a64c7f783306fe1b0b8562af70e SHA-256: 9023ddad7ebae5dc48e2625c87213a9396cf721174d7eeb1aec914c78d11e0f2
120 Risk Score

Malware Insights

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

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 a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the phrase 'Briggs and stratton service manual', suggesting a lure to trick users into clicking the malicious links.

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=briggs+and+stratton+service+manual
    • http://files.ktventertainment.com/uploads/1/3/1/6/131606874/f32cafa.pdf
    • http://files.lasierrasoccer.org/uploads/1/3/2/6/132682040/vegujel.pdf
    • http://files.takebacktheknight.com/uploads/1/3/2/6/132681824/5084498.pdf
    • http://files.uniteddisciples.org/uploads/1/3/1/3/131379899/xekatekabaturani.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/gurobawuzemarenobavevozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/17378304098.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/wefirizafenomek.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/rukoduvadikumebizukuvuvib.pdf
    • https://cdn.shopify.com/s/files/1/0434/9139/3698/files/mivijojopafixozedin.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8577/files/20485327301.pdf
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/gunaxotup.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/79959562879.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/damin_rice_9.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/losefemoxubemowipajuforo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2803/8310/files/lexigilagiwutogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/xiwufepivedid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.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_off00005c9a.bin
9a7300fff43c3a75999ee399f81c5468e4e0d0fadecafad04867567445b8ad5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9A 5368 bytes
font_01_sfnt_off00006ece.bin
80ff1d8bdf5c4442a46f6bb0c219fc61d4d6b202e260755bd853cae40bf9179b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECE 9764 bytes

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