Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad3e27b5b70aa57…

MALICIOUS

PDF

44.2 KB Created: 2020-08-17 15:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9a1d4afc6a2c226a2b400547b62ec0da SHA-1: ce6068df04e6af86753ab75b174d100b314f6819 SHA-256: 2ad3e27b5b70aa577389a71eb6230f6bdbd15dc915c0dff995d0c6e9dff12769
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=brandon+woelfel+preset+pack+free In PDF document text
    • http://files.eaglerivermassage.com/uploads/1/3/2/6/132681409/kekolebafojagar-vupugaxezajemo-xojefineviv-rerun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/5151179522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6742/4416/files/73511897007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9226/2560/files/to_verify_the_truth_table_of_logic_gates_experiment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5598/6326/files/bipolar_disorder_self_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4519/0821/files/4933497367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/dipakujokokoxixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/48648806105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5986/1909/files/ruwedegimiwopagefemasumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/wabumoxap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/what_is_purgeable_space_on_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7701/6483/files/sikamafemubero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2830/8387/files/mezifozuropeli.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB2 5356 bytes
SHA-256: c175fe627ddcdef639afe3ff2519108b458340327686bd05531550c4dae86991
font_01_sfnt_off00007f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F06 10908 bytes
SHA-256: 30ba530996d94d93af542fed9650c57716c08aa2d43a6254d4ae3a71fbc101fb

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