Malicious PDF — malware analysis report

Static analysis result for SHA-256 0805001250a4de17…

MALICIOUS

PDF

40.7 KB Created: 2020-08-12 13:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d149b1db19533e7979cb4290b50c675 SHA-1: 96b182c4c9a5cccd884d936eec531c0b37c2d24d SHA-256: 0805001250a4de17422ce5ea4bb7eedce8fb0bfc98dc7b29375d36171749a9e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a download for free sheet music. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this malicious intent. Additionally, the heuristic 'PDF_SEO_LINK_FARM' indicates the PDF is part of a larger network of linked PDFs, suggesting a coordinated effort to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=free+sheet+music+for+brass+band+pdf
    • http://files.eastafricanscholarsfund.org/uploads/1/3/0/8/130874284/rirate.pdf
    • http://files.cornerstonechurchofalpena.org/uploads/1/3/1/4/131453684/dadiregi_junadete_fomujoxaxafu_jisatele.pdf
    • http://files.augustaraptors.org/uploads/1/3/1/1/131164431/7123886.pdf
    • http://kejusidip.helenmerlinafatir.com/uploads/1/3/2/7/132712615/1742156.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0725/4439/files/tosugaguvefuni.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7710/files/nikogabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/persona_5_throbbing_king_of_desire.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/46930234687.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/breaker_box_label_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/nepixujamokoxetijimunekaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3221/files/61546266061.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/cabinet_ministers_of_rajasthan_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/8378/4601/files/epistaxis_orl.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7957/files/tagapinujataguronevox.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_off0000533c.bin
d3ab0f7265444cd13f0e61faf34dcb3834843e838de20ebb9d2162a3cd35f0fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x533C 5340 bytes
font_01_sfnt_off00006536.bin
b97b047c14bbd7aa5178475365f745155ec2bed6b489dc49138a69e5430d7a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6536 10120 bytes
font_02_sfnt_off000087d7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D7 4324 bytes

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