Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab11c231d49da7d…

MALICIOUS

PDF

35.2 KB Created: 2020-08-06 20:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 522ff90ac9ec28f7bc3661d18484902b SHA-1: 023f6591c2d73af359b5a0dff44d6f445081a071 SHA-256: 2ab11c231d49da7d1e6036e6743f2fe10cbd72dae58cb9be0b132515403b6c7f
120 Risk Score

Malware Insights

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

The PDF file contains a lure for "CCNA materials" and exhibits characteristics of an SEO link farm, with numerous external links. One critical heuristic identified a link to known malicious redirector infrastructure at `ttraff.com`. The document body, though heavily obfuscated, contains the primary lure and the malicious redirector URL. 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.com/pify?keyword=ccna+materials+pdf+free+download
    • http://files.cwnativeplantfarm.com/uploads/1/3/2/6/132681536/waverelobu_dosagisudoti_zidob.pdf
    • http://files.ims-university.com/uploads/1/3/1/3/131378943/2634024.pdf
    • http://files.juliaadrift.com/uploads/1/3/1/8/131871717/gotikumizikagegebut.pdf
    • http://files.surggripper.com/uploads/1/3/2/7/132740965/xelafixugowuf_xetafonemoba.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/the_dark_knight_rises_script.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/jofufigofav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/tisafojufepoxona.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/surah_baqarah_full_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65107231385.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/aieee_2020_solutions_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/10039252784.pdf
    • https://cdn.shopify.com/s/files/1/0440/1600/9374/files/39993254565.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/jetiremasikijexefirome.pdf
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/64171875516.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_off00004bfc.bin
e53c4a212ffe2481a12977b175406fea4756d81e49b6ed98406f18e5546e3868		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BFC 5296 bytes
font_01_sfnt_off00005df5.bin
ffb168b3801df46ba2161630f59d4d54197af0853b28e04a4c62f17cb13539ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF5 10024 bytes

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