Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bcdc2ac692f60de…

MALICIOUS

PDF

37.0 KB Created: 2020-08-30 13:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f862a5103a26e41c9d086a99d8d79ae2 SHA-1: 8bcb86ab081ec8259463249bc54bf7a9f99d1a62 SHA-256: 1bcdc2ac692f60ded221b079950559c3e04fe6239a878c1c8145ec08097c4b01
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains this URL and a reference to a nutrition menu, suggesting a social engineering lure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=simple+nutrition+wahpeton+nd+menu
    • https://cdn.shopify.com/s/files/1/0432/9704/6696/files/relative_clauses_exercises_teach_this.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/99184953219.pdf
    • https://cdn.shopify.com/s/files/1/0439/1393/7064/files/hypertension_in_the_young_guideline.pdf
    • https://cdn.shopify.com/s/files/1/0439/4123/2795/files/desarrollo_del_nio_y_adolescente_pd.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/zolijajopima.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magizokoluredofet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7225/7181/files/webm_to_gifs.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8962/files/zitozudonutewede.pdf
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/78463693566.pdf
    • https://static.usrfiles.com/ugd/c068f8_2424dc064dfa4bf99f8a6ccda74a0d2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0d15a98e73a46568002f219140aba0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9c67e83c2b848b2824693c1314b23eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d37cacaac1b4d3b83e38fa871d2ed5f.pdf
    • https://static.usrfiles.com/ugd/97493d_9dd0a02004eb434bbda1ce0bb7036d6a.pdf
    • https://static.usrfiles.com/ugd/97368a_e2a26a57b5e445809b3666afa1716908.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_a9642c17513d4d839fa64547dd60b939.pdf
    • https://static.usrfiles.com/ugd/b8c837_d135705168cd4abcae0b1b26b3c28bfb.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_off000048bb.bin
39f387fcf3715265bf1905d88726c962561f80794fe660a8df56c4ecb50f9004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48BB 5216 bytes
font_01_sfnt_off00005a4d.bin
3e54d4a55fc6c17ff17014e8626c3f1abbf9b92bed422991a4881197e22f7976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4D 2712 bytes
font_02_sfnt_off00006615.bin
4978ae53d499d7cfae02ac06bfc231503ff09725f22b7640bbf48880ca7f1a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6615 9620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.