Malicious PDF — malware analysis report

Static analysis result for SHA-256 705f1effb9fdd352…

MALICIOUS

PDF

46.9 KB Created: 2020-08-30 04:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec1d8ba6e48f601d0e8ee5144d2b58ae SHA-1: 461baaf9914db7c749b99971a9aa3676909aefe0 SHA-256: 705f1effb9fdd3524712c0696962315e38a28e32611836ce365b6878db5a9a48
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, includes the malicious URL and a list of other URLs, likely part of a link farm to improve search engine ranking for malicious content. The ML classifier strongly indicates 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=coraline+neil+gaiman+quotes
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/6cf392_2f6872bc3fe84d519e18a96ef1483582.pdf
    • https://static.usrfiles.com/ugd/b8c837_543d269272a24a689d5f9a5bbf8546a8.pdf
    • https://static.usrfiles.com/ugd/136d07_8f8812ab836d4effb481aeaeb8e66abd.pdf
    • https://cdn.shopify.com/s/files/1/0439/4139/6638/files/ain_t_misbehavin_lead_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/zapekupibubivizolej.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/velamevowusobinuner.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1741554469.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/69497716281.pdf
    • https://static.usrfiles.com/ugd/d43733_5b6b97253de945d39e9dcb932fd6a7f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1c8e0aa06f8420399027d1e12471151.pdf
    • https://static.usrfiles.com/ugd/3b47cb_cee1c0bbba9746779815e9253b77a1f0.pdf
    • https://cdn.shopify.com/s/files/1/0428/3501/7895/files/screenshot_windows_xp_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/0612/2393/files/acr_manual_on_contrast_media.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/1772265697.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000629e.bin
d56242e220adda94782983aeebdc99afa8be53cd97964e5219f2ee7ffecabc45
pdf-font-stream PDF embedded font (sfnt) at offset 0x629E 5036 bytes
font_01_sfnt_off000073a0.bin
466e4ec24b0885fcc6d3d54d5298244d4317123d841440e44fc5e7756f086893
pdf-font-stream PDF embedded font (sfnt) at offset 0x73A0 14000 bytes
font_02_sfnt_off0000a0a7.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A7 4324 bytes