Malicious PDF — malware analysis report

Static analysis result for SHA-256 177977ed9d62bc19…

MALICIOUS

PDF

33.0 KB Created: 2020-08-31 06:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01e07409ead0ee650993848ba0191ed1 SHA-1: 9b942ec40899a4243ac559851877544816f866ec SHA-256: 177977ed9d62bc1923000a1464cedbe9d18093ceb93a1225459ad4f0f479819e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `ttraff.com`. The document body, though heavily obfuscated, contains the same URL, indicating an attempt to direct users to malicious content.

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.com/wix?keyword=philip+glass+truman+sleeps+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5260/4319/files/40680551714.pdf
    • https://cdn.shopify.com/s/files/1/0440/6290/0374/files/sajawunefanejadotimiboju.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/cards_against_humanity_uk.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/50108316602.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0465/5785/5894/files/perforated_aluminium_sheet_brisbane.pdf
    • https://cdn.shopify.com/s/files/1/0457/9039/6572/files/39350400191.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/nunidukejepasikalefevo.pdf
    • https://static.usrfiles.com/ugd/fd3290_3ca1d9b6b67e4cf0bd2001d98fe6f5fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f959a69199c4408965e1bfad6b4f0ca.pdf
    • https://static.usrfiles.com/ugd/5b9a87_cc58fdf88ef349499893ae171901000d.pdf
    • https://static.usrfiles.com/ugd/f96b02_d07ef5de8e084d028d17a26645f44cd1.pdf
    • https://static.usrfiles.com/ugd/122077_cedf068ebb614febba3d315742e657cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1e15348104e4cf1a43f89dd17fac07f.pdf
    • https://static.usrfiles.com/ugd/b8c837_76caa8574d1f42748c249e5a7a8c8f39.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_off000042f6.bin
da648858edc48aabfe17927d1b306462a82fae4cc87b17b08efd4ac82fee1fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x42F6 5348 bytes
font_01_sfnt_off000054fc.bin
eed3eeb892778372363b74c6c136787a1499ad081ae71e65fe46d5a41a233753
pdf-font-stream PDF embedded font (sfnt) at offset 0x54FC 10016 bytes