Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd0428970d0ba9d…

MALICIOUS

PDF

49.3 KB Created: 2020-08-06 18:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2aa50b9e8a0093a7e3113108e0e4cf26 SHA-1: 5c871c968adf4363106c5fc746469b94e187e287 SHA-256: 0dd0428970d0ba9daeb577fe829f043ced4a38720579eb6a6113f950c6ce4024
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 30 external PDF links, including a redirector to known malicious infrastructure at `https://ttraff.ru/pify?keyword=bandmusic+pdf+library`. The document body also contains this URL, suggesting an attempt to lure users to malicious content. While no scripts were extracted, the presence of numerous links and a malicious redirector indicates a phishing or content-luring attack pattern.

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.ru/pify?keyword=bandmusic+pdf+library
    • http://files.danhalpernmusic.com/uploads/1/3/2/7/132740545/4271840.pdf
    • http://files.anamarielewis.com/uploads/1/3/0/7/130776246/sebesoratom-piridi-nisibulujititud-jajefusivi.pdf
    • http://babijugid.impactwisconsin.com/uploads/1/3/1/4/131453574/kiwul_juvanilur_ladudibewimuvad_vujojuxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5131/0486/files/20918929498.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/21631282589.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/manual_of_structural_kinesiology.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/98535090590.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1218/files/4070461811.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/zixiwo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4872/0789/files/dinowed.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/rixamapivazeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/bot_2_scoring_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/65446264189.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/nojowifabenepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenixuraxolitater.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_off0000746d.bin
b769ab92868e70b5ad8f0f1f7ca58196b9e4d90c91a9bc553e36044d68a706e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746D 5164 bytes
font_01_sfnt_off000085cf.bin
8becbc46c8bfe770847c42860b3f367d4f06a69cf2b0434a014997a5a6f901ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CF 10808 bytes
font_02_sfnt_off0000aa7f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA7F 4324 bytes

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