Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f926dec51e68e6…

MALICIOUS

PDF

43.2 KB Created: 2020-08-11 03:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c207ef26be1bb228cc2e115257dfb3c1 SHA-1: 35154b02183a5a305aa13a24c2a64b0988af06a0 SHA-256: c6f926dec51e68e6dcee4cd9ab11e396e019aab0eaad4bf7a4e17093ec4f0750
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This redirector is disguised with a keyword related to 'earthing calculation formula pdf', suggesting a lure to trick users into clicking. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to malicious infrastructure via a deceptive link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=earthing+calculation+formula+pdf
    • http://files.eatsith.com/uploads/1/3/2/6/132696015/bufexagoti.pdf
    • http://fedozimig.naftgraphicdesign.com/uploads/1/3/1/4/131438539/18135.pdf
    • http://files.paragonshows.com/uploads/1/3/1/0/131071082/dikadivuleg_gepure_vupewap_gifarubopijexu.pdf
    • http://runurawe.solereaperz.com/uploads/1/3/1/6/131606490/32f0b1a28cc370.pdf
    • https://cdn.shopify.com/s/files/1/0447/7534/2246/files/gubesusuzifexime.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/19051498657.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/digimon_dusk_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0435/8540/5089/files/gexurururu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9597/files/93773201864.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/delta_faucet_repair_kit_lowes.pdf
    • https://cdn.shopify.com/s/files/1/0436/2688/9369/files/65686872715.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/widizosatadusuzovasovodas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/16954561312.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_off00005fbf.bin
70c5f68e46b692b6ee3e88a86f8706defca28368c19fb89fa0d79295b6224f5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBF 5112 bytes
font_01_sfnt_off000070e9.bin
6279369db2df1957225b72fa40bb4c66e31ff39c9a2acc2bef5f1d740a1513d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E9 9656 bytes
font_02_sfnt_off000091e2.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E2 4324 bytes

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