Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b76c452a35f8b6…

MALICIOUS

PDF

39.1 KB Created: 2020-08-13 10:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a857ec78b3bbd78d3e03d45ea64b563 SHA-1: 19e7b547e8760c57c96ab328df1d5875b376e0d9 SHA-256: 84b76c452a35f8b6ceb1bbfa7fa1b2b5bcbf53cc35d7f57001b1ac93a4fabfca
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'cross stitch design books pdf'. The primary malicious URL is ttraff.cc, which likely serves as a gateway to further malicious content. The presence of many external links, including benign ones hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates to the malicious redirector.

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/wb?keyword=cross%20stitch%20design%20books%20pdf
    • http://famofojas.photoartannakoudella.com/uploads/1/3/1/0/131070493/kaderop.pdf
    • http://files.fitzgeraldenvironmental.com/uploads/1/3/0/7/130740490/2034032.pdf
    • http://files.risingachievers.org/uploads/1/3/0/8/130813524/gofaruz.pdf
    • http://files.jasonschwabart.com/uploads/1/3/1/4/131438055/povumozaxegawefaxixi.pdf
    • http://files.homeschoolingwhileblack.com/uploads/1/3/1/0/131070618/ruterabo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2099/files/model_based_clustering_methods.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/44633908309.pdf
    • https://cdn.shopify.com/s/files/1/0438/4276/4962/files/indore_master_plan_map_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/in_n_out_spread_nutrition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/18222213963.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/the_tao_of_wing_chun_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/6283/4853/files/rokeboxasovaguxemixete.pdf
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/54597858942.pdf
    • https://cdn.shopify.com/s/files/1/0436/6866/8569/files/3815396719.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/43762392791.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/96023726063.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_off00005ae1.bin
c15938c6405f3a44bfcc87355cdc612aec8695c6192ecfa2dc9fb61ce44fb5c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE1 5284 bytes
font_01_sfnt_off00006cd5.bin
6a744265baecb75c1c1ada3e8083ae009a3de048903fb861198bbe23d50f1ed8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD5 10192 bytes