Malicious PDF — malware analysis report

Static analysis result for SHA-256 652bc79ea9a32945…

MALICIOUS

PDF

38.8 KB Created: 2020-09-19 16:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 157c87111a6b52dc2f3b6f770722a09e SHA-1: dfc5212a04487282b69564ed1d5e011d4a31e8f2 SHA-256: 652bc79ea9a3294585351c4dbb197399635387a5a951e6bda8abef01488dddc6
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically directing users to 'ttraff.me'. The document body, though heavily obfuscated, contains the URL and a lure related to 'Lowes plant return policy 2019', suggesting a phishing or scam attempt. The presence of numerous embedded links, many pointing to Shopify PDFs, indicates a link farm designed to obscure the malicious redirector.

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.me/wix?keyword=lowes+plant+return+policy+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7448/5401/files/bacterias_aerobias_anaerobias_y_facultativas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/85870861933.pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/arapa_renme_kitaplar.pdf
    • https://cdn.shopify.com/s/files/1/0468/1285/6474/files/tatusosilut.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/febufuwopijuwifatokel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/49938028674.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2753/files/xusexerelubejusuwonanuwu.pdf
    • https://f68990e8-ed26-4923-bdb0-6e57a4da3b84.filesusr.com/ugd/e66789_090d3e2d49c644caa551d871ce6d3ef7.pdf?index=true
    • https://d101ef02-c55b-49ad-a309-a07be1146092.filesusr.com/ugd/a771bd_f728ee5fa7ba4a6e9656050d79456578.pdf?index=true
    • https://20f3e33c-06ed-49d8-808e-05fa3a34189d.filesusr.com/ugd/f515ca_5817b07ed975404fa1e52c6e7ef7b676.pdf?index=true
    • https://38c85bd2-1bfa-4773-8b21-63c673794f1b.filesusr.com/ugd/3f4b99_8ec4ebebe8d44a8b95c234ef59475411.pdf?index=true
    • https://12d36db8-2592-45fb-8904-57c1c49f8c7a.filesusr.com/ugd/affb4a_37e73eab1602475b946619d928d364a3.pdf?index=true
    • https://02426884-7dd1-42da-9b5c-91f56d3d1814.filesusr.com/ugd/432b07_6e44aefb4d484cda82a9d8c7048dc881.pdf?index=true
    • https://ad71500a-49c3-4a74-b7e8-bb94429fd18f.filesusr.com/ugd/c4ccc4_c05a25a6dd63464a836504df8f3a909d.pdf?index=true
    • 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_off000056ff.bin
1d4e4e5130b31e7fb3de86b460f10d12e4e43ddc0f8b1beef54b1bd7b6c7624a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FF 5544 bytes
font_01_sfnt_off00006a0b.bin
73c0cab9a7aa17d5588288ba4e21bc5046429320858bf2a3466a1f6e6b8a059d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0B 11000 bytes

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