Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e015c350ea2c4a3…

MALICIOUS

PDF

48.1 KB Created: 2020-08-13 22:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a85ab9baf591604145969126f6c94585 SHA-1: df854148c6f9218b6b9ada4a113861cd25105eab SHA-256: 0e015c350ea2c4a3e0b3f2a7b492e12c7318a2226a84f05fcbf0a2ad40724a54
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One prominent link, https://ttraff.com/pify?keyword=evidence-+based+medicine+guidelines+for+migraine+headache, is identified as a malicious redirector. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated.

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=evidence-+based+medicine+guidelines+for+migraine+headache
    • http://files.writing.halfsky.org/uploads/1/3/1/4/131407695/c3fefe493ad40.pdf
    • http://zagub.bartendingbydennisinc.com/uploads/1/3/1/3/131379510/7754235.pdf
    • http://rizoru.artworkbyrachelsellars.com/uploads/1/3/0/7/130776760/dazofolan.pdf
    • http://jerawul.focus-hypnotherapy.com/uploads/1/3/1/3/131379578/2631345.pdf
    • http://files.heritagefinancialnorth.com/uploads/1/3/0/7/130775747/wopew-jaluz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/53285616397.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/xebujukarogodusijur.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/63075656415.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/12209013886.pdf
    • https://cdn.shopify.com/s/files/1/0445/8987/5364/files/aprende_ingles_con_juanito_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/fowara.pdf
    • https://cdn.shopify.com/s/files/1/0429/5298/2684/files/21627316728.pdf
    • https://cdn.shopify.com/s/files/1/0429/6412/3814/files/imperative_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0437/7791/7079/files/convert_to_word_online_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/76943911384.pdf
    • https://cdn.shopify.com/s/files/1/0431/4493/7628/files/lidifiwanejugokeso.pdf
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/bedenkenanmeldung_vob.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/coordinating_conjunctions_list.pdf
    • https://cdn.shopify.com/s/files/1/0436/4907/3312/files/81639003181.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_off00007b39.bin
80f71554828b5596ab7ecf035b761fa1825e899470cf88d914f7db82d635251b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B39 5624 bytes
font_01_sfnt_off00008e35.bin
9ea22c3d46d3ae0640d5f247c58536b9249c23b53032c16c07ee669daa7f89d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E35 10652 bytes

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