Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea11a3c0c57d14a…

MALICIOUS

PDF

51.7 KB Created: 2020-08-21 10:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8323ecf638243aeff6ca541b382daeed SHA-1: e1599eb13514000d326ca8f36e244a5408380e8e SHA-256: cea11a3c0c57d14a4aee15a09062c15fe8de2f31f412cbcb3c9939d0f8e31ae2
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This is further supported by a PDF SEO link farm heuristic, indicating a large number of external links, many hosted on Shopify. The document body contains text related to an 'Excel date reminder template' and a visual download button lure, suggesting a social engineering pretext to entice users to click the malicious link. The primary malicious URL is https://ttraff.cc/pify?keyword=excel+date+reminder+template, which likely leads to further 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.cc/pify?keyword=excel+date+reminder+template
    • http://pavefeb.fohow.club/uploads/1/3/1/3/131398222/eefe0539e77f2.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/bemenezanaledek.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/52290710459.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/resident_evil_5_treasures.pdf
    • https://cdn.shopify.com/s/files/1/0441/0517/1096/files/performing_arts_jobs_brisbane.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1821/files/2911150151.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/guild_wars_2_necromancer.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/83609036349.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/36474309755.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/pojufopogeparewonagejesu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5680/6553/files/bosototulajulejud.pdf
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/rch_guidelines_febrile_seizure.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0377/files/7228002111.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_off0000709e.bin
683cec9bfca6c192ebd890274a49751937de75bb6bc4e3f8117daec2b579ec28
pdf-font-stream PDF embedded font (sfnt) at offset 0x709E 5068 bytes
font_01_sfnt_off000081c0.bin
71bdf6aabebe23fa831b3ae5a6272198c2b5f235a1871c3e82043614aaf2bfc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x81C0 13252 bytes
font_02_sfnt_off0000ac60.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC60 16312 bytes