Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52e7da9c44df5ee…

MALICIOUS

PDF

41.2 KB Created: 2020-08-11 13:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c95abe11bbfebcb5257d7f0e3ea08b2 SHA-1: 58b31b78aafd6522ff8dfb08375500a65cd1f9a7 SHA-256: d52e7da9c44df5ee31109c104284cc8090b62a97e4a9f389f5bff95e9cc69f26
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=android+phone+codes+pdf`. This URL is likely intended to trick users into believing they are accessing legitimate information, while actually redirecting them to malicious content. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a link farm or redirection strategy. 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=android+phone+codes+pdf
    • http://files.estudiolandarch.com/uploads/1/3/1/8/131857679/1340164.pdf
    • http://files.familycarestl.com/uploads/1/3/0/8/130813301/situkeve.pdf
    • http://files.callstevekapur.com/uploads/1/3/1/4/131411539/2160806.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/tuwudawiza.pdf
    • https://cdn.shopify.com/s/files/1/0438/5197/2768/files/switzerland_visa_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65496272691.pdf
    • https://cdn.shopify.com/s/files/1/0428/5736/5670/files/bibliografia_estilo_apa_de_un.pdf
    • https://cdn.shopify.com/s/files/1/0444/5110/2887/files/atlas_10_lathe_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/bejarifudonasut.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/gowamemujofizodufov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3654/files/wavezotasute.pdf
    • https://cdn.shopify.com/s/files/1/0433/6471/2599/files/bringing_the_nation_s_husband_home_novel_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0381/2773/files/tisudibesalurasi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5078/5173/files/marginal_costing_in_management_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0440/7872/7318/files/pdf_a_dwg_di_cadsofttools.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_off000062f2.bin
5f14e0ffbccf1cd18d1f3e6ab7987858ab50b7f203dd038b2a26537615423096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F2 4988 bytes
font_01_sfnt_off000073df.bin
deeb4a9ecec0c31391b1a8bf7e5160ac30ce0d0606245df452cb86b5fe742a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DF 10676 bytes

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