Malicious PDF — malware analysis report

Static analysis result for SHA-256 05be7849ba2970b6…

MALICIOUS

PDF

42.7 KB Created: 2020-08-19 12:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3539910187fc40b98ed38243135eef2b SHA-1: 0926c65412b228c133b1a2265cf74ed7b18217b6 SHA-256: 05be7849ba2970b602fd20e042e6e22897bdc571a36151607ade3fb02f99f1c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'chrome notifications android virus', suggesting a phishing or scam attempt. The presence of numerous external PDF links, including one to a potentially malicious redirector, indicates an attempt to drive traffic to malicious sites.

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=chrome+notifications+android+virus
    • http://files.pulexart.com/uploads/1/3/0/7/130739126/sefibutusebulo_berisu_mepobelirud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/32737601886.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/guia_de_medicamentos_farmaceuticos_y_para_que_sirven_venezuela.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8440/files/51215904407.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/27741953529.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/93781697405.pdf
    • https://cdn.shopify.com/s/files/1/0438/3706/3328/files/liditefazibuxasoru.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3690/files/33939031070.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/81954411726.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavokalozetaxolemo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/33489692498.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/12928952011.pdf
    • https://cdn.shopify.com/s/files/1/0448/1184/5793/files/difference_between_diglossia_and_bilingualism.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/97961277943.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/toxuvutadosategibafutako.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_off0000690b.bin
19948e23a0680335f857b637062052d26dce0d263677a53838c781f58a42b183		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690B 5196 bytes
font_01_sfnt_off00007a91.bin
5e23714b46b59e3cb0d9f279f32b45312fb870b28dec1f51974c4631a5ab98e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A91 10272 bytes

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