Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddfe10707ac19e73…

MALICIOUS

PDF

35.5 KB Created: 2020-09-02 08:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07b18f019395adbcfb21b8405916a8d8 SHA-1: 375fec58e7a8e50a804688f5ca82ec60f516ec5a SHA-256: ddfe10707ac19e73327dc5d46276c1e217591a4e4420208d5c6743dba31a2916
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.cc/wix?keyword=gmetrix+photoshop+cc+test+1+answers, is flagged as a malicious redirector. The document body suggests a lure related to "Gmetrix photoshop cc test 1 answers", aiming to trick the user into clicking the malicious link. The presence of numerous other PDF links further indicates a link farm strategy, likely to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/wix?keyword=gmetrix+photoshop+cc+test+1+answers
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0435/8973/0467/files/data_center_design_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/2064/7576/files/25367509902.pdf
    • https://static.usrfiles.com/ugd/55cc32_63cf491f16424b0b8d38524601d5aa70.pdf
    • https://static.usrfiles.com/ugd/7198c1_86d902674e7546d2ad2547baeb3d8d1b.pdf
    • https://static.usrfiles.com/ugd/aff7ca_786a161051d645c482965cb8f7ce2a71.pdf
    • https://static.usrfiles.com/ugd/77941b_a4b880a96eb4458590c1ebee080bad18.pdf
    • https://static.usrfiles.com/ugd/097bd5_89088335591c42729abbc359f7962ea8.pdf
    • https://static.usrfiles.com/ugd/3c9ac1_96e247f0781e41e19449c80c6e351d9c.pdf
    • https://static.usrfiles.com/ugd/0baf77_cab1b47bd02442ad97490308765a9d09.pdf
    • https://static.usrfiles.com/ugd/2c8d66_527f6b0abdce4bdfae8ccf1aa0a3adab.pdf
    • https://static.usrfiles.com/ugd/7d21c0_8b268c63addb4a38af7e5602270bd93c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d51f0409b5254051a863753429337874.pdf
    • https://static.usrfiles.com/ugd/4d935e_49180335177742368dbfda5af98e79ef.pdf
    • https://static.usrfiles.com/ugd/de60da_475491028a954e488f4fa4ed5ca8c281.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_off00004e8b.bin
3be2a12ee03be92784f8a3971d30b1b39ed1915e8e26da70f6e7984381894511
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E8B 5384 bytes
font_01_sfnt_off000060c9.bin
43c825ae5a05befff9523b5edb8185481020e90a2d6708b000cfc9e8976d69c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x60C9 9564 bytes