Malicious PDF — malware analysis report

Static analysis result for SHA-256 051b7675c5794df3…

MALICIOUS

PDF

66.3 KB Created: 2020-08-12 19:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d745cadbee3b0fdb138708781a05394a SHA-1: e31bb80b213a5f21d19b1fc6f12fca3eab37d64c SHA-256: 051b7675c5794df305ce67a5b098699799a1f2c04314605d59786f7983ec0045
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector identified by the heuristic. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

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/pify?keyword=casebook+on+the+law+of+succession+pdf
    • http://nawurune.worldtripgirl.com/uploads/1/3/1/0/131070487/wituxapux_dujogezoto.pdf
    • http://files.thewardenfamily.com/uploads/1/3/1/0/131070011/bejosuputin.pdf
    • http://files.pvawrites.org/uploads/1/3/1/4/131406977/tonixo.pdf
    • http://files.daytonatopagents.com/uploads/1/3/0/7/130739061/wewapatomewek.pdf
    • http://nogusug.astoria2000.net/uploads/1/3/1/1/131164250/2877587.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8980/5983/files/dexuletotawaduwoze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9319/files/dibanijejudixakuri.pdf
    • https://cdn.shopify.com/s/files/1/0440/2325/1094/files/classroom_words.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2261/files/toxokonusepuvibunifuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/24699744604.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87960197539.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69901941500.pdf
    • https://cdn.shopify.com/s/files/1/0449/0631/5943/files/korin.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/96191048371.pdf
    • https://cdn.shopify.com/s/files/1/0431/3356/7125/files/liwowewamofotupadari.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/ren_c3_a9e_felice_smith.pdf
    • https://cdn.shopify.com/s/files/1/0435/6331/9445/files/29536195634.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/wekusikeboxiwam.pdf
    • https://cdn.shopify.com/s/files/1/0435/6774/3139/files/adjectives_suffixes.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_off0000c67e.bin
4893a7258067e241d0e5eae8fc37ea6d12f6da01322421b1e1b88e9e8faa6a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC67E 5348 bytes
font_01_sfnt_off0000d8b7.bin
ce1e9471fbcee4c9157c6574b2059acb590d55aa714682cad15548e20446ea92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B7 10196 bytes

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