Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9313469bf3f274…

MALICIOUS

PDF

42.7 KB Created: 2020-08-02 19:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f689c4fc84cf6c3ae00a32902a76c772 SHA-1: b601327541bcde03be9c38e8ad5d8ca5f2b8e90e SHA-256: da9313469bf3f2746150034b38f3e029a5054cf0e31f91dd26c5b28fc0d1f883
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=games+like+panda+pop', is likely used to lure users into a phishing or malware download scheme. The document body, though heavily obfuscated, also contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or content distribution strategy. No scripts were extracted, but the presence of malicious redirectors and a high ML classifier score indicate a high likelihood of malicious intent.

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=games+like+panda+pop
    • http://files.yestodestress.com/uploads/1/3/2/6/132695416/4391634.pdf
    • http://files.elginartsassociation.com/uploads/1/3/0/7/130739616/ddc1e5.pdf
    • http://files.mcfeesilversmiths.com/uploads/1/3/0/9/130968962/3d5e2542b.pdf
    • http://files.westvirginiastatecouncilmobilewall.org/uploads/1/3/2/7/132712088/fomasix-witipiterapi-demadu-kisararedi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/mijuwajak.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/xojil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/94703800687.pdf
    • https://cdn.shopify.com/s/files/1/0432/3472/1959/files/psycho_killer_chords.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/javascript_array_remove_object.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6888/files/41220694082.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/26125632012.pdf
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/51354378243.pdf
    • https://cdn.shopify.com/s/files/1/0431/5784/8224/files/take_on_me_minecraft_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/3254/2369/files/luzukunokajegegitiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8711/files/79445918039.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006934.bin
074838b8963c7e6b51132b189eb462cef423c713d6b0184e5327c732b61acc42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 5104 bytes
font_01_sfnt_off00007a89.bin
275dc67fdb4e048f1a9a37c7323d9c5d8d6cbd50afd3f1847460453224c9677f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A89 10252 bytes

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