Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f541b7e5a96908f…

MALICIOUS

PDF

42.3 KB Created: 2020-08-13 09:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88996a82055354d32fca6b290e170f92 SHA-1: 9407efb3fe1481de3781606d61bc7978a2ef256d SHA-256: 9f541b7e5a96908fa49dd9b92e11e86ddb0bbfd0b4857f9d6fc3d88156f99906
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to PDF editing and includes the malicious redirector URL, suggesting a lure to a phishing or malware distribution site. No scripts were extracted from this sample.

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/wb?keyword=editing%20a%20pdf%20document%20in%20adobe%20acrobat%20pro
    • http://files.danbedental.com/uploads/1/3/1/6/131606727/f020c7d.pdf
    • http://files.willowtreecathotel.co.uk/uploads/1/3/1/3/131381518/vemevipuwozuwuv.pdf
    • http://files.freyawaterson.com/uploads/1/3/1/4/131453284/1622477.pdf
    • http://files.benefit.live/uploads/1/3/2/6/132695455/285406.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4191/files/reading_ielts_with_answer.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/9188101279.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/wididorotowudukanuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/ribodu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/60093391421.pdf
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/44531743949.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/nuweruwedabugenijini.pdf
    • https://cdn.shopify.com/s/files/1/0435/0921/9492/files/kelosixafofoduwagipav.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/68799811461.pdf
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/50851747359.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/bonjour_tristesse_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/jasinu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/salesforce_certified_administrator_study_guide.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_off00006884.bin
678eb176ffa3ede00585c639137998cbdc920dfbb783866627d68b6bf98e4f6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6884 5360 bytes
font_01_sfnt_off00007aa4.bin
b59edd93e8d785986dea5e96dd814772bdf520ce955698917ce160b6efb94a35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA4 9780 bytes

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