Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0475be0a69a91d8…

MALICIOUS

PDF

53.8 KB Created: 2020-08-11 14:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2967fd19ed4f3064cad0ac701b81431f SHA-1: 8f23203a308ab95b2b0584f1745dee6cabe5b7a2 SHA-256: b0475be0a69a91d84af82a4d97eaf991920e01e12bbc82693537c5a49875dd86
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=cantos+de+adoracion+acordes+pdf, which is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious content.

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.ru/pify?keyword=cantos+de+adoracion+acordes+pdf
    • http://files.yallbeetubin.com/uploads/1/3/0/7/130775025/215eb6dfa.pdf
    • http://files.first5460.com/uploads/1/3/0/7/130739112/fenebepabuv_sefaxisapofixe_fozimujidevu.pdf
    • http://files.gruenetroutfitters.com/uploads/1/3/2/6/132695408/rukeguk.pdf
    • http://pifejadaf.2ndnaturedesign.net/uploads/1/3/1/6/131606490/wiranetoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/raribajedavebapudiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/dodudemanowefirog.pdf
    • https://cdn.shopify.com/s/files/1/0437/6340/0861/files/treatment_appendicitis.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9767/files/minajenefobomuxox.pdf
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/angiotensina_funcion.pdf
    • https://cdn.shopify.com/s/files/1/0437/4691/8551/files/microsoft_certified_azure_developer_associate_az_203.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4675/files/99207365067.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5975/files/extract_public_key_from_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/sobaxifejoga.pdf
    • https://cdn.shopify.com/s/files/1/0437/8784/5790/files/apostila_java_orientacao_a_objetos_caelum.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_off000087ca.bin
704d79509b94400b51dc9aab83c7bf95994326ec60768b3e14a5a50f618dc5f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x87CA 5024 bytes
font_01_sfnt_off000098e6.bin
584f6126196a2f47f6a8860ec36c64ffb0dec9360f73f113330aed9d9eb793c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x98E6 15600 bytes