Malicious PDF — malware analysis report

Static analysis result for SHA-256 163ae76328b53792…

MALICIOUS

PDF

314.4 KB Created: 2020-08-14 16:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf12508f79fefb97209245f7dd267913 SHA-1: 8e4948b80629eede1dcd2b1e4f15d757f49b925e SHA-256: 163ae76328b53792b26a49656b0aeaf7b73b0bf94e3ae274bd0c635857a00adb
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=graves+jgl+guide'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

Heuristics 3

  • 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.
  • 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/pify?keyword=graves+jgl+guide
    • http://files.unlvasce.com/uploads/1/3/2/3/132302894/d9d89940.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/33317111016.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/vuwisupaduzotasi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/25461837696.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/97033444789.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/dell_710_specs.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/85800440578.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/68310462218.pdf
    • https://cdn.shopify.com/s/files/1/0434/4646/8769/files/tinkers_construct_experience.pdf
    • https://cdn.shopify.com/s/files/1/0431/8373/4943/files/bestiario_julio_cortazar_gratis.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_off00049444.bin
580368178110be5c5597d648ff3d6003fce66bde393c280da1b14c4e816134e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49444 5160 bytes
font_01_sfnt_off0004a5f1.bin
605b65e7a2a6a3c7ff3fb2a6844a3c96213d648d2618b7b25f8420466fbc88e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A5F1 16920 bytes

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