Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc0f5af1f07c2b4…

MALICIOUS

PDF

46.8 KB Created: 2020-09-02 07:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81032162bb82c4fdace63b69b7c6737b SHA-1: 1f514f8a14070903bd29dd5d78f4ac858a583bd3 SHA-256: bfc0f5af1f07c2b4847a31a220ff008a42cb4179c827dc8b9d15e102637dd097
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One critical heuristic identified a link to a known malicious redirector at ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though partially corrupted, contains the URL that likely triggered the heuristic, suggesting a social engineering lure related to a song cover. The file's purpose is to redirect the user to malicious infrastructure.

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.cc/wix?keyword=lagu+coldplay+fix+you+cover+alexandra
    • https://static.usrfiles.com/ugd/b8c837_aa2b60c55aad4b728d1a8283c69586e4.pdf
    • https://static.usrfiles.com/ugd/f46427_2ecef6d735214b99b4a65dfd5a94c8a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_55ccc61bb7a942039f0ba64841579924.pdf
    • https://static.usrfiles.com/ugd/83b1b3_375f2143f9724958a30e6675f3800f09.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_64c113d73f0e465b85c72a1cb78fa1e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_1de87f838e7b449388f40ad979f462a4.pdf
    • https://static.usrfiles.com/ugd/dd4472_b21a2f5a1b16485cb938525673170cf4.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/fonodediwovapetomaxun.pdf
    • https://cdn.shopify.com/s/files/1/0434/0085/5706/files/98050457902.pdf
    • https://cdn.shopify.com/s/files/1/0429/5956/9055/files/tetuxijulawonizewegenopaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6567/1833/files/bcsh_guidelines_heparin_induced_thrombocytopenia.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/73000876715.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9622/files/xepunukakonaximudepawa.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_off000054e0.bin
3bdb008312372225a7292f36612aac44a55581f33368b1a570cbdfcca009a7f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E0 6132 bytes
font_01_sfnt_off00006a2a.bin
9014f6cd292153b070d10f887ed5aff421d22b4779430a0e8445c97782cac3f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2A 5316 bytes
font_02_sfnt_off00007c6a.bin
97e62cbc7c4fd2bd37600fb917fa0590a19eea2151e6689e04cfe04d4c6d7bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6A 15500 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.