Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd98b3e529671f28…

MALICIOUS

PDF

37.9 KB Created: 2020-08-15 20:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 431aa658281368af13d035cbedbf7e00 SHA-1: 70832b4f9c896252a3944065efa9c0fa59e3779d SHA-256: fd98b3e529671f28c2317a246b23e81b5cfbbab2d01d0f2976aa2ae5c1ccdec4
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body and embedded links suggest a lure related to 'Ll bean flannel sheets' or academic materials, aiming to trick users into clicking the malicious link. The PDF also hosts a large number of external links, many pointing to Shopify, which is a common tactic for SEO poisoning to improve search engine ranking for malicious content.

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=ll+bean+flannel.+sheets
    • http://gevudi.canonsparkfriends.org/uploads/1/3/1/4/131408027/laxadotefur.pdf
    • http://files.atlfoodista.com/uploads/1/3/0/7/130738970/9827553.pdf
    • http://wijuzawa.yorktowngirlscouts.org/uploads/1/3/2/6/132682467/4504784.pdf
    • http://files.shuttersmore.com/uploads/1/3/0/8/130814208/toriba.pdf
    • https://cdn.shopify.com/s/files/1/0446/0855/3123/files/calculus_by_anton_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9816/files/94118073012.pdf
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/dobusodevin.pdf
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/xasugasulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/srimad_bhagavatam_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0297/7700/files/wixapezujutogi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/learn_spanish_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0441/1876/9816/files/wunajinamutuzaxaxigikoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/mikazaguzenogazamitoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8585/6919/files/32857529840.pdf
    • https://cdn.shopify.com/s/files/1/0437/3538/4225/files/jemipa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/hybridization_full_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/278103850.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4780/files/hipospadia_y_epispadia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c96.bin
adb6464f35b2b8193245ac924dd3f8177ea8be19163e13da0cb19841b783b179
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C96 4500 bytes
font_01_sfnt_off00005bd2.bin
f92edfbecd3c36872e0f5a2b2a5770e73e26f584548b9388b6d34491249bbd7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD2 9576 bytes
font_02_sfnt_off00007c78.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C78 4324 bytes