Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7c44c3b98978d2…

MALICIOUS

PDF

32.8 KB Created: 2020-09-05 19:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e896122b5a5bb89d16166126c87ca648 SHA-1: d6ad56cc7cbb2454bcbb66f7177bfce260e7a78d SHA-256: de7c44c3b98978d22ac2a0d8cc67fb3ad1e7450ff50dc9f821269391ac090a47
130 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, which leads to a link farm of other PDFs. The primary malicious URL is ttraff.link, which redirects to a PDF hosted on static.usrfiles.com. This suggests a phishing or social engineering attempt to direct users to potentially malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/pify?keyword=bible+niv+version+free++for+pc
    • https://static.usrfiles.com/ugd/b8c837_dff7c2f01dfb49fc867614780af3b1a9.pdf
    • https://static.usrfiles.com/ugd/9734e7_331dece7326742ed93608e544290e8cf.pdf
    • https://static.usrfiles.com/ugd/6c032c_01b40d825d4c4593965821df36081200.pdf
    • https://static.usrfiles.com/ugd/7598fa_9ea914dea4774b438806799665cacb5a.pdf
    • https://static.usrfiles.com/ugd/912de2_156eac9586d14cffbd752ba6243bdb9e.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/21640596843.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/60984143598.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/country_code_852.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7897/files/33356734238.pdf
    • https://static.usrfiles.com/ugd/11baf9_96834398530d478a919e88dd2a26d9a2.pdf
    • https://static.usrfiles.com/ugd/3ed44c_b813ca0a99294c5b9a3f9dbd96ffeffe.pdf
    • https://static.usrfiles.com/ugd/724bd4_ee7eb60379c946aeae28e0535d0acfb8.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_off0000439e.bin
b143222599d6e9f0f9ae0542502bf816aff41a2741f35831cd7e16d72d9ff94d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x439E 5048 bytes
font_01_sfnt_off000054e7.bin
ddea7947d4d84e8ebd732b4b81d926dce4cb827fc5510f675f66285772b717ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E7 9988 bytes

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