Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff612953a496f9b…

MALICIOUS

PDF

81.0 KB Created: 2020-08-29 02:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27b93f04b4abd3d83965ba10aa43e092 SHA-1: 3f788a824d4578e8ad15c54531f00b65517cd624 SHA-256: 3ff612953a496f9b254bf74aa8637b343417967d84df15de4267b2f294a6d70e
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL, https://ttraff.com/wix?keyword=rimworld+mountain+base, is embedded within the document and likely serves as a lure or initial point of contact for a phishing campaign. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=rimworld+mountain+base
    • https://static.usrfiles.com/ugd/b8c837_93879a5317f44462a68c02a82ce7a5da.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0a0d84e93d44a1384f66c8a901f878c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0de82c59e5914d0a97f4cb3f40464daf.pdf
    • https://static.usrfiles.com/ugd/b8c837_411ac86cb72845088f6f82335e195277.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a53140c68e54a268f467692d0803f34.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3073/files/mighty_rage_potion.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/lakitepasurag.pdf
    • https://cdn.shopify.com/s/files/1/0432/3616/3747/files/soil_mechanics_laboratory_manual_braja_m_das_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0464/0912/1960/files/76915744942.pdf
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/bmw_diagnose_software_rheingold.pdf
    • https://cdn.shopify.com/s/files/1/0428/8233/4883/files/84004870009.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0485/files/lupimemevikugoradedo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5045/7505/files/canadian_federal_election_candidates_platforms.pdf
    • https://cdn.shopify.com/s/files/1/0428/4802/6780/files/translating_verbal_expressions_into_algebraic_expressions.pdf
    • https://static.usrfiles.com/ugd/b8c837_3de7cee158594bb4a84d59cdef87c45d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d26a20e73f614ce597cdf42293637a9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dec8d5a7b7643518844e8243d688872.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c1c2a3713ab43eab5e5e0d28b856f2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b52de928a3dc467795c003702e94c2be.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_off00010268.bin
deda4061f484bbe9d37aa2af0ead0f753be5311a030df4e1d619898df6287164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 5212 bytes
font_01_sfnt_off00011413.bin
b3f9b70659d1985c7f9a34b4dfde0262ff2b4ec9f7047b631eed61d626aa25bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11413 9956 bytes

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