Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0b4c8afeb44e60…

MALICIOUS

PDF

50.3 KB Created: 2020-09-01 20:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a9f5c102fb86d7b93eb52c29c8931e3 SHA-1: cb38c8c98101618857c608abfb38f6e764feea59 SHA-256: 1c0b4c8afeb44e6086e4b3f9db17d8c43c7b08b0f39dbefb34370fdacbc8cc93
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.com, disguised as an answer key for a brain anatomy diagram. This suggests a phishing or social engineering attack aimed at directing users to malicious content. The file also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to obscure malicious activity.

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.com/wix?keyword=label+the+brain+anatomy+diagram+answers
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mirogorozizodixomalejog.pdf
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/89726802211.pdf
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/physical_chemistry_silbey_solutions_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_03eac66e30104d518342abf41c340fb7.pdf
    • https://static.usrfiles.com/ugd/097bd5_15cb14ecadaf42b096f52dc08f320e60.pdf
    • https://static.usrfiles.com/ugd/99afdc_21ee3afc15734ce19493dea05353173b.pdf
    • https://static.usrfiles.com/ugd/b8c837_828c7b6b1e374f26b03c6deba4942538.pdf
    • https://static.usrfiles.com/ugd/b8c837_667933dfe85642a585d3573aa8fc227a.pdf
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/wesowonunorekitomegoxovo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/99058599794.pdf
    • https://cdn.shopify.com/s/files/1/0461/1122/8067/files/concierto_de_aranjuez_piano_sheet_pd.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/8062924701.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/wujojifulumorilexo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/ditomafepevakufuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/nojoserir.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6632/files/85827780472.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/66521217430.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/57066551585.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_off00008634.bin
0da6509432239d241cd03b9cb7aa62837c602d68bdf86f0c6a81cba09122b678
pdf-font-stream PDF embedded font (sfnt) at offset 0x8634 5512 bytes
font_01_sfnt_off000098d5.bin
7094fe0a2817984cafc77582ee4721ac6e554d126c1069aa878467e103300f0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x98D5 10420 bytes