Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8967bb8acb4109…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 09:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0a4a4400f20c23b6b39fa9b5ae57260 SHA-1: 80bb5ed981b8d5a7a1105f4ae208629c7e1e4f79 SHA-256: aa8967bb8acb4109b41ebff2e72eada241bd2672aef54b18140c1b6b7901dddf
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 'https://ttraff.ru/pify?keyword=allstar+performance+coupon+code'. The document body, though heavily obfuscated, contains references to 'Allstar performance coupon code' and the malicious URL, suggesting a lure to a scam or phishing page. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to distribute further payloads.

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=allstar+performance+coupon+code
    • http://josokom.warrnamboollawntennis.com/uploads/1/3/1/3/131384016/9066252.pdf
    • http://files.delaneyswiftart.com/uploads/1/3/1/4/131408954/serorezabetalirugedi.pdf
    • http://files.shenandoahebr.org/uploads/1/3/2/6/132683334/cd6d3ac.pdf
    • http://files.crushcop.com.au/uploads/1/3/1/4/131483097/mivujexaxinotevapiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/arteria_cerebral_anterior_media_y_posterior.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/15353115402.pdf
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/saints_row_2_cheat_codes_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0815/files/19224222247.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/aristoteles_libros.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/ronurupogozuwejovozuxode.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/nys_form_nf-_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/torch_browser_windows_7_free.pdf
    • https://cdn.shopify.com/s/files/1/0441/0431/9128/files/sovokuxuxupumiwuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdf
    • https://cdn.shopify.com/s/files/1/0435/7878/5951/files/foo_fighters_wheels.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/notezoretaduvafetezegipex.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/zelejito.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_off00006399.bin
e0e72ba0618b98836f5194142817d06f2c69da47c1e7023e6e9e387449bab1f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6399 5288 bytes
font_01_sfnt_off00007577.bin
892133b053a71beccc48e5ea7180dc731fc8acd5675121dc31baf995f98a996a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7577 10852 bytes