Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f38648e4a6aae1…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 03:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b683519da2bf1e89e469421765c4ef58 SHA-1: b6fdce46771783713e1274cdddc05f799343c53a SHA-256: 14f38648e4a6aae1b91af1de0a900cff309cf2bd05ca750439ec232686238640
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as "emoji game answers". This suggests a phishing or scam attempt, likely delivered as a spearphishing attachment. The PDF also contains a large number of links to other PDFs, potentially for SEO manipulation or to host further malicious content.

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=emoji+game+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/9c43ec_5da84558151c47dc98a3e061c0f611d9.pdf
    • https://static.usrfiles.com/ugd/6116da_a42101d921524b62934ce2478c0e50e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ca733eb7ac848cf887eb8202189f8c1.pdf
    • https://static.usrfiles.com/ugd/f84671_39c152daf3ec4323abf8c89418260949.pdf
    • https://static.usrfiles.com/ugd/f0f215_5662dd86e52d418e9cb11ecb3259315f.pdf
    • https://static.usrfiles.com/ugd/289c5e_9ef436604806419fa5a58253f0b05ce5.pdf
    • https://static.usrfiles.com/ugd/d54300_10bcd103d9b34f91b3d01b589aea645b.pdf
    • https://static.usrfiles.com/ugd/b8c837_07194948e0f94b1e95d745f6ae29c3ba.pdf
    • https://cdn.shopify.com/s/files/1/0462/6654/8373/files/metal_gear_solid_1_ps1_rom.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/asexual_versus_sexual_reproduction_worksheet_answers.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006165.bin
92d61cd511b0697b0b2be842a250a62f22bfcca56fb975c508ba2d68eb5c9b2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6165 4808 bytes
font_01_sfnt_off000071ad.bin
c5047f4f8b248bd6235648e1b938a7337f788a2e1b9272d1d47ff557ef8f8f92
pdf-font-stream PDF embedded font (sfnt) at offset 0x71AD 10800 bytes
font_02_sfnt_off0000960c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x960C 4324 bytes