Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99f00227ff30cd4…

MALICIOUS

PDF

51.3 KB Created: 2020-08-21 18:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9dfc3c502e011fb65474d398589a4c9 SHA-1: 51ac25e0d7b987ef193fa527fec52897b550c810 SHA-256: d99f00227ff30cd4ba6e3a24173a8733acacfe6fc93018e0e10ddef2fa1ea96d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains a string that appears to be a lure related to Android toolbar customization, likely intended to trick users into clicking the malicious link. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=android+toolbar+change+hamburger+icon
    • http://files.pegasuscreationscandlecandyshop.com/uploads/1/3/0/9/130969543/baxekad_zanasiwas.pdf
    • http://xojikide.eugenesoundproofing.com/uploads/1/3/0/8/130815009/godimepafixe.pdf
    • http://files.placentiatheatre.com/uploads/1/3/2/6/132695586/dfaf0.pdf
    • http://files.sar6inc.com/uploads/1/3/0/8/130814205/1375825.pdf
    • http://files.becuriouscuisine.com/uploads/1/3/1/3/131382092/simaraw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/20469063243.pdf
    • https://cdn.shopify.com/s/files/1/0447/9896/7974/files/blank_nid_card_psd_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/55845638682.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/abnormal_liver_enzymes_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/27500112719.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/17079150078.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/flat_rent_agreement_format.pdf
    • https://cdn.shopify.com/s/files/1/0463/2500/6497/files/angry_mood_off_video_status.pdf
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/79751920999.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/lezufujibisemesefutolibaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/saroresumadokaziludop.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/
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/abnormal_liver_enzym

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008086.bin
3562e361e0c3c14fb0340b6f563205a170b93d971088f7bdc9fefaa3117fe94f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8086 5304 bytes
font_01_sfnt_off00009259.bin
987684cc7ff5ae9eafb17a225733d1537e913c7c4bd4c7856692fe564afb95cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9259 14352 bytes

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