Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8f4d649a1db133…

MALICIOUS

PDF

47.6 KB Created: 2020-08-30 13:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f2e7812b9229d76d79d3815c728397c SHA-1: d6f5cc4888c0939c29926e6f5b7fed3225452f15 SHA-256: 1c8f4d649a1db133a1f3fb1b535fe8e8ec958a905fd070f733bc3ceed314d4c3
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. It also fired for PDF_SEO_LINK_FARM, suggesting a large number of external links, many hosted on Shopify. The primary malicious URL identified is https://ttraff.cc/wix?keyword=2016+ap+statistics+free+response+answers, which is likely used to redirect users to further malicious content. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify links.

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=2016+ap+statistics+free+response+answers
    • https://cdn.shopify.com/s/files/1/0433/3512/3102/files/36224448796.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/schering_bridge_theory.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1411/files/3600691403.pdf
    • https://static.usrfiles.com/ugd/90c678_a2c10b1f507e4554a72f0fedeb21bd71.pdf
    • https://static.usrfiles.com/ugd/ca32a8_1c58c679edc14e888358814903f4ed81.pdf
    • https://cdn.shopify.com/s/files/1/0435/2249/0532/files/hip_hop_mix_2016.pdf
    • https://cdn.shopify.com/s/files/1/0439/0243/5483/files/14087329913.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6143/files/how_to_run_makefile.pdf
    • https://cdn.shopify.com/s/files/1/0434/4882/8065/files/tavuxabinol.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/ultrasound_scan_report_format_for_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0449/9731/2676/files/38765407732.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_off00006cfd.bin
c39474c310ff708378943f83764bf3a78ff0f9fc05fbf7ded1428fd0221fde0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFD 5244 bytes
font_01_sfnt_off00007ed8.bin
f5f96ec17ff4d2119dfffee83ae3f4bda3784329dd342909de5bdcd46e82af85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED8 10868 bytes
font_02_sfnt_off0000a3b9.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B9 4324 bytes

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