Malicious PDF — malware analysis report

Static analysis result for SHA-256 2603cd56a9338b40…

MALICIOUS

PDF

50.0 KB Created: 2020-08-29 08:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c2d801c6746b03c7ab3f99df4b61a27 SHA-1: 0406eb4d6157074e2d67ab8a18af95d5d7fd0fdf SHA-256: 2603cd56a9338b40f65c2f5777dce39af22479b83dc725a83ae9e7f286ac60b0
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains this URL and other URLs pointing to Shopify, likely as part of a link farm to improve SEO for malicious content. The ML classifier also strongly indicated maliciousness.

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=sacando+os+trapitos+ao+sol+significa
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/sevulovupudajatas.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3540/files/84562429851.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/funny_cards_against_humanity_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kikurum.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c5e88d230c347a6a819567be00ac3b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3e5809652954f9e84b7c3be85fabc93.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b67de8ac186408984b0f9405165d63d.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf29c5708f764ffc9cd337e655c13732.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d8f27f1c3a94be4b9f7f1a6f11f55db.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/gowewinovorigosik.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/tulolefuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/churrascaria_plataforma_coupon_discount.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/43308363824.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_off000085b4.bin
64a877fd8acda29f5d7808e59f04c26ca052f56e215dea1b8e2b88bf9c237012
pdf-font-stream PDF embedded font (sfnt) at offset 0x85B4 5424 bytes
font_01_sfnt_off00009824.bin
9251a5cd87a6689177bbd78a564b43f99d390dcbcd7920943875016106695ec4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9824 10148 bytes