Malicious PDF — malware analysis report

Static analysis result for SHA-256 b698958049a6551e…

MALICIOUS

PDF

48.3 KB Created: 2020-08-22 00:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8f71ca2ff6a9a56bbd56390dd7c047d SHA-1: f94524b0c3d920bd1a9fa48fb170491bef391bd7 SHA-256: b698958049a6551e838bb663f43f67780fe4d580fd7bf6ef4a106a90794c5b67
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'dilations observations worksheet answers' and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=dilations+observations+worksheet+answers
    • http://files.intentionalenrichment.com/uploads/1/3/0/7/130775027/sopuvasamapofe-mekuwo-lipebegidu-dukogesafom.pdf
    • http://dalopuge.allterrainridersatvclub.com/uploads/1/3/0/8/130814237/fuwenixaja.pdf
    • https://cdn.shopify.com/s/files/1/0433/6120/6422/files/3d_live_animated_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0437/4318/2999/files/pdf_booklet_printing_wrong_order.pdf
    • https://cdn.shopify.com/s/files/1/0435/2199/9008/files/wonexifabut.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/applied_social_science.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/frans_ferdinand_take_me_out_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/9857/0909/files/bengali_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/88252951383.pdf
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/38859901769.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/jeturuguzaporerofale.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/cardiopatia_congenita_en_lactantes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/35721034791.pdf
    • https://cdn.shopify.com/s/files/1/0429/6605/7116/files/rezebupesugenivivobob.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/mimejevid.pdf
    • https://cdn.shopify.com/s/files/1/0428/6598/3655/files/60959654850.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_off00006a57.bin
6aaee87ac1d8c77a27a6cd5e592ac600e841d5444881a2137d9e3df036ededf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A57 5128 bytes
font_01_sfnt_off00007bd4.bin
c98bf9786b45427aa41f8d084384307763efcaae5430357e3df17860b538daa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD4 10124 bytes
font_02_sfnt_off00009ec7.bin
49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC7 16148 bytes