Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1c7ad9d7c6e6a0…

MALICIOUS

PDF

72.6 KB Created: 2020-08-10 04:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e7b8e75989cbc1e25aa22a9680855f SHA-1: d02a197c87f40bc2420088e2c41b8379e5744c6e SHA-256: 9e1c7ad9d7c6e6a02d41f3c04936656e95a688972781ae0b0117c403472bdc17
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded external links, forming a link farm. One of these links, 'https://ttraff.cc/pify?keyword=cardiovascular+agents+pdf', points to known malicious redirector infrastructure. The document body contains garbled text but also repeats the malicious URL, suggesting a lure to trick users into clicking the link. No scripts were extracted from this sample.

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=cardiovascular+agents+pdf
    • http://togaxekuz.obchaymarket.org/uploads/1/3/0/7/130738732/kapereses-buwemuriw.pdf
    • http://files.scottkaplanphd.com/uploads/1/3/1/4/131483110/3705741.pdf
    • http://files.zenprovcomedy.com/uploads/1/3/1/3/131380063/zaxigabikatan.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/telumulewa.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/vokari.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/34330415395.pdf
    • https://cdn.shopify.com/s/files/1/0438/3706/3328/files/shrink_a.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/zofirazupojopojebor.pdf
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/error_invalid_active_developer_path.pdf
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/4392817066.pdf
    • https://cdn.shopify.com/s/files/1/0433/3099/4326/files/mitifowapof.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/70437984396.pdf
    • https://cdn.shopify.com/s/files/1/0433/7382/2102/files/cornlius_castoriadis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalajenoderemomepofelefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3232/files/educacin_y_neoliberalismo_en_mxico_jaime_ornelas_delgado.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6608/files/health_and_wellness_11th_edition_free.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d3c.bin
160f76826cecc168faeccba3cfe4a44dfdd21b3111cad0116e42bfe0a76e4a59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3C 5012 bytes
font_01_sfnt_off0000aea1.bin
7c5ba786a1a83fbb45522388f585c102a7e6b67283b17b05c6087c5cf44b0024		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA1 5288 bytes
font_02_sfnt_off0000c0b6.bin
47f58b39fe7d658f7e673d7973bfc8b2125cd4c9e05d76b0df71ab0dde4d6c42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B6 15644 bytes
font_03_sfnt_off0000f13b.bin
ebaa9d42c58e3fd25c8264bcf4ef2319fee467c92cf53dcc1f377a20fc8d39b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF13B 16148 bytes
font_04_sfnt_off00010633.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10633 4324 bytes

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