Malicious PDF — malware analysis report

Static analysis result for SHA-256 011b7911beba4a16…

MALICIOUS

PDF

44.5 KB Created: 2020-08-09 20:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b7e482062b1876a80e3688890360f77 SHA-1: 1dfe94d641d69c0e029cea55607c985b4cc0eab3 SHA-256: 011b7911beba4a16d152877a21f3cf12b132a539df74adbc45f9e905d9768662
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, identified as a link farm. One critical heuristic indicates a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains references to the same malicious URL and other Shopify links, suggesting a coordinated effort to distribute content or redirect users. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=archie+comics+riverdale+pdf+espa%25C3%25B1ol
    • http://wemele.hillmarfarm.com/uploads/1/3/0/8/130813528/tefitofaxivuzex_latirugu_kamonoxibajimo.pdf
    • http://files.clevelanddance411.com/uploads/1/3/0/7/130740012/3297077.pdf
    • http://files.acoptical.com/uploads/1/3/0/7/130738681/mokabi-rokaw-munewe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/bihar_vidhan_sabha_interview.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/misabodanosawerivivasus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/lavamubunifoferuxuvam.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/lepivuzusalumorux.pdf
    • https://cdn.shopify.com/s/files/1/0437/7011/8302/files/37992184428.pdf
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/temakivoligukolateja.pdf
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/adjective_noun_collocations_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3656/files/silabus_biologi_sma_ktsp.pdf
    • https://cdn.shopify.com/s/files/1/0433/1552/7833/files/ketoroziveputexejapofub.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3882/files/toni_romiti_my_way.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5510/files/59506049696.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/7692646517.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/74022397410.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d80.bin
2e893ca415fd5113eab36f310ed7138c3f39067c57c027917c31694cad389360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D80 5656 bytes
font_01_sfnt_off0000805a.bin
425be871c800ffa7ddd5e849371eec98b07ca03fb2c05348cc31df1e7f9f4cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x805A 10156 bytes

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