Malicious PDF — malware analysis report

Static analysis result for SHA-256 0397af2fb1c7d641…

MALICIOUS

PDF

81.7 KB Created: 2020-08-18 21:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 538a3c46959c00c64eeaede29142822b SHA-1: 4fcd61332588dd438d71e38366b8e3c02534e8de SHA-256: 0397af2fb1c7d6416ae2c4208bffe031a8c62f351679d80f3fa04b8c57195935
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many of which point to a redirector infrastructure. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to direct users to potentially harmful 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=chloroform+uses+today
    • http://files.aubreypotash.com/uploads/1/3/0/7/130738889/1499249.pdf
    • http://serivod.riavandeneynde.studio/uploads/1/3/0/8/130814328/7095713.pdf
    • http://rugudorus.llenise.com/uploads/1/3/1/4/131437364/gomelepu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/6277/8263/files/allen_test_series_for_neet_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/41506397210.pdf
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/engineering_c_programming_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5750/files/guruk.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/binuwujojawekov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/somafukewojutagokadav.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/future_maker_products_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/aby_warburg_mnemosyne_atlas.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/amaravati_kathalu_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/widegugopekaviwusitutuvo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4949/9289/files/48993973416.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d791.bin
b9c1bd2281f23f09d905494077011cda678d8ff8a20e62f41a46584ce81a564d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 6492 bytes
font_01_sfnt_off0000e7c6.bin
7a14357f9136005ff34b7a67154c23e7b40acd814d02f3339302cda2f1f6b30d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C6 5000 bytes
font_02_sfnt_off0000f8d3.bin
b20bd9bc7cb94dbc7f10b14f1ae2f66198ab18ef281a98fb08899ebd24f263c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D3 15624 bytes
font_03_sfnt_off000129b9.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129B9 4324 bytes

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