Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e9ce45488aad44…

MALICIOUS

PDF

39.3 KB Created: 2020-08-17 07:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81ffb2e66dea9d4948b041b97df426d9 SHA-1: e6de64b0596ca5428b4bafb4713e2bcb00339091 SHA-256: 90e9ce45488aad449377e7c81114226a2acc64caf13cd35667d4c3fddec67d8b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=blastula+formation+ppt', which is likely intended to lead the user to malicious content. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF.

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/pify?keyword=blastula+formation+ppt
    • http://wemigib.karilerum.com/uploads/1/3/2/7/132740505/8169677.pdf
    • http://vapenifur.portsmouthwc.com/uploads/1/3/1/1/131164250/wodagemusakez-fajigibo-zotapuga-ruzebudapupiw.pdf
    • http://files.houstonprimaryschool.com/uploads/1/3/1/3/131398253/067d284f2.pdf
    • http://files.newmexicomade.com/uploads/1/3/0/7/130775510/4665836.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/2490269847.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/duxarer.pdf
    • https://cdn.shopify.com/s/files/1/0452/5237/8784/files/camera_angles_in_film.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/gukekilodekalefawoduzib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/escience_lab_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/mawakamutepiwugiwokiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/tusuzuwenipukunizi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2259/8823/files/xupasezit.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6488/files/lakamodovaridokikunarilik.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/37210586448.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/struct_inheritance_c.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_off00005caa.bin
cae146ac708174daa5b021d422981d205afa9c1ef10d096795c71a5e23e4ab85
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAA 5096 bytes
font_01_sfnt_off00006de5.bin
d61cec740e0b3efe75294dee3ae5f2e989b91c8d40458eb7e45df89197274206
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE5 10180 bytes