Malicious PDF — malware analysis report

Static analysis result for SHA-256 414c387c57aac018…

MALICIOUS

PDF

149.4 KB Created: 2020-08-08 05:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3f97a8ca6613ff2173fffeb80ba4d12 SHA-1: 635b3cdcb3d763369d78b77a9a84e8a2a1c8d4ca SHA-256: 414c387c57aac01805d4032d08d6cd30575f5cf6cc107d4a7a588a5ca61e2301
94 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 pointing to 'https://ttraff.com/pify?keyword=augustine+of+hippo+books+pdf'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence for a malicious redirector attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=augustine+of+hippo+books+pdf
    • http://files.skyvusolutions.com/uploads/1/3/0/7/130776152/sobemakawubi.pdf
    • http://files.boysandgirlsclubsglbr.com/uploads/1/3/0/7/130776054/kawuzif.pdf
    • http://solovali.oliveministries.org/uploads/1/3/1/4/131482976/9897827.pdf
    • http://files.dogamelbourne.com/uploads/1/3/1/4/131437394/bfe8920.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/sufebek.pdf
    • https://cdn.shopify.com/s/files/1/0430/1484/8671/files/anganwadi_offline_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/gejesefegujigeboruz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/54531806043.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/melabotulomir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wogol.pdf
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/biodiversity_action_plan.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/sodogatebojoroxufowipe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/what_is_a_rhyming_couplet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0700/files/lutamiforomelexin.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_off0001f420.bin
0f4f0421c6e701cd4f3d043a6a92932776f7cbe8b8805fed3ead00ec57c37a56
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F420 5160 bytes
font_01_sfnt_off000205b2.bin
5491a4e37cd2d7443a0aff3b12948c4004e2bd93d3c6ee95315321b90270c534
pdf-font-stream PDF embedded font (sfnt) at offset 0x205B2 14068 bytes
font_02_sfnt_off000232cf.bin
ebaa9d42c58e3fd25c8264bcf4ef2319fee467c92cf53dcc1f377a20fc8d39b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x232CF 16148 bytes