Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b6f11510c15574…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 17:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cf00b195decca465091a301f4fb2c1e SHA-1: f60c2795164ea200d10d1a19ca40d6cb651140d6 SHA-256: 05b6f11510c15574f4ca0d320b739177fd906b0de40e27653d97e6d37f1c0e74
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the same redirector URL and mentions a game download, suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=autobahn+police+simulator+2+apk+indir
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3997/1736/files/58664536907.pdf
    • https://cdn.shopify.com/s/files/1/0435/2462/0447/files/15455541951.pdf
    • https://cdn.shopify.com/s/files/1/0437/2047/4779/files/anglican_xhosa_hymns.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/17289250008.pdf
    • https://static.usrfiles.com/ugd/b4a829_e2e9110f02374827b28605caf705297d.pdf
    • https://static.usrfiles.com/ugd/b8c837_37475495a1fd49119f4afbe7eedaad49.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a60f4f1975640dfb9fb79f334aec1fd.pdf
    • https://cdn.shopify.com/s/files/1/0439/9605/3662/files/wetter_cavallino_treporti_14_tage.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/46830676510.pdf
    • https://cdn.shopify.com/s/files/1/0465/0608/2454/files/rainbow_six_siege_impact_grenade.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/cammy_street_fighter_android_wallpaper.pdf
    • https://static.usrfiles.com/ugd/b8c837_19bf628f17bd479e96ab3a433509fdc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_de4b68173cf7430ba8f07f3740fed396.pdf
    • https://static.usrfiles.com/ugd/c836c3_0053dd297e3a49929870982e8f0f98ca.pdf
    • https://static.usrfiles.com/ugd/5360f8_3164ffbec8aa49fea8fb25c4f0da0cde.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005928.bin
1e396cae22bdc6aa3bf098a543e1abe57b5bb18105075db4f1e4a89b916df9c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5928 5640 bytes
font_01_sfnt_off00006c25.bin
ecfaf7fde021e17bd538d57931dad53b011fd8274b4c61af66b3a2ac7e74f683
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C25 10356 bytes