Malicious PDF — malware analysis report

Static analysis result for SHA-256 be128e10fbb43ca0…

MALICIOUS

PDF

46.2 KB Created: 2020-08-17 14:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8a2ab866f82b843617ad45595a26968 SHA-1: 9c66cb1d408d42688947cf2e25b042d486a21964 SHA-256: be128e10fbb43ca035b031b6a12a68ba461a18964e28173b147d70b17a73b772
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM'. Many of these links point to external PDF files hosted on Shopify.com, suggesting an attempt to manipulate search engine results or distribute content. One link redirects to a known malicious domain, indicating a potential phishing or malware distribution vector. The ML classifier also strongly flagged this PDF as malicious.

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=ko+ko+korina+song+coke+studio
    • http://wimina.sauvagedjewelry.com/uploads/1/3/1/0/131071157/zipadafi-wuzelo-setesafamujek.pdf
    • http://zupuxiv.empoweredlifestyles.net/uploads/1/3/1/3/131379578/2867399.pdf
    • http://files.valeriecreane.com/uploads/1/3/1/3/131384070/zejikebivuviv-fawevan.pdf
    • http://jadafege.elisabethlagrone.com/uploads/1/3/0/9/130969596/raxepamoxuje.pdf
    • http://zedigidu.laurenvmiller.com/uploads/1/3/2/7/132712615/zuxunikeduv-kemevazazomugip-lopuwu-jarazagoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/54476412106.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/18672955922.pdf
    • https://cdn.shopify.com/s/files/1/0437/1798/4410/files/champions_league_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/2516/8544/files/walafujulowaxolaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/1086/6851/files/65445993814.pdf
    • https://cdn.shopify.com/s/files/1/0431/0407/5933/files/27154353131.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/differential_equations_polking_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/kosunalajepipugaguxon.pdf
    • https://cdn.shopify.com/s/files/1/0440/3858/6518/files/actuarial_tables_uk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3414/files/51472179639.pdf
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/retencion_de_placenta.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/attribution_theory_psychology.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_off00007423.bin
f2af5a9979087e3d129b339a929c9cf0ed5ee37402a71cc014208333d46ff9d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7423 5108 bytes
font_01_sfnt_off00008585.bin
2d878239aea8c36f830c61c0dd224ec700fb6233fd8139062132f3306c30e2fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8585 11864 bytes

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