Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af327ef6a441f6d…

MALICIOUS

PDF

68.1 KB Created: 2020-08-22 07:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 752a019cbf81f2ba8287805bc1deaf75 SHA-1: fd1eb182aa8914560c468cc3d0d79138071a23a0 SHA-256: 3af327ef6a441f6d1e00dba99afd3e7dffdbeb029e104b3408d46bbc5b7a4f6f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=arbeitszeugnis+bedeutung+formulierungen', is designed to lure users into clicking it under the pretext of providing information about employment references. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. No scripts were extracted, but the presence of a malicious redirector and the link farm structure suggest a phishing or social engineering attack.

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/pify?keyword=arbeitszeugnis+bedeutung+formulierungen
    • http://files.isrgrandrapids.com/uploads/1/3/1/1/131164048/8197748.pdf
    • http://dazuzu.benzieatvassoc.com/uploads/1/3/2/6/132696398/siralanimud.pdf
    • https://cdn.shopify.com/s/files/1/0431/5771/7143/files/welodenagewudutefegodi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/74616716177.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/krishna_bhagwan_photo_image.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/20606263091.pdf
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/jijesakajibenemefekefumek.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3008/files/sources_of_nitrogen_dioxide_pollution.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/54133103297.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/coc_mod_apk_offline_server.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/kolepomu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/fezesupemilab.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6653/files/90221086142.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a545.bin
4455747fda9ac97410526ac3fee3ca643cc61cb592146befb7df79af2604d95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA545 6424 bytes
font_01_sfnt_off0000b527.bin
c5d17e4e2a74deacbea0a3e97113fc27f54198858cbf02f65fc64975a204e895		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB527 5196 bytes
font_02_sfnt_off0000c6c1.bin
5e606375f86f31663d4b16ec2577377fc365c0ee7bcf9c2989a4015623d512d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C1 11204 bytes
font_03_sfnt_off0000ebab.bin
2b5e7e198710ce25a9c9facea4da25a8305a97bff148003313a6d74af80700ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAB 16084 bytes

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