Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adc65383ae63311…

MALICIOUS

PDF

52.2 KB Created: 2020-08-30 14:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 094d832a764d8a950e9b47e6efc5d778 SHA-1: 5563acc44b32a901028df498bbccea57d4f46d2f SHA-256: 2adc65383ae6331184ad8b00f85ac11b6bf20e68985c6645935c34aac0a54056
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/wix?keyword=a+dying+planet+mass+effect+andromeda, which is likely used to redirect users to further malicious content. The document body contains obfuscated text and embedded URLs, consistent with a lure 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.ru/wix?keyword=a+dying+planet+mass+effect+andromeda
    • https://static.usrfiles.com/ugd/06497e_e1af98e88558433db77affceadd0e665.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff238bc9a5d74139b1572a6204f549ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2ee6f8678d1489fbb101be2827087c9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/adolescent_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/75487953376.pdf
    • https://cdn.shopify.com/s/files/1/0435/6089/4627/files/zukasolojixuwit.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/xejub.pdf
    • https://cdn.shopify.com/s/files/1/0464/5437/4568/files/fegozadorasijutaxag.pdf
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/xemuse.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/74022123378.pdf
    • https://static.usrfiles.com/ugd/a467d2_4dccd5f5ea704d7788e291d81831d518.pdf
    • https://static.usrfiles.com/ugd/d162e3_32674fa518e3424494d1f04adea2755d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d959ab4ea29e44358bc3c9c5325339e3.pdf
    • https://static.usrfiles.com/ugd/dd4472_c0631935f1ca4190adcb17b6344a3ba9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008056.bin
b2e033f52ef6e7ca8b0de9654dd735cd667136959a42fde5d95397a60265c709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8056 5352 bytes
font_01_sfnt_off00009277.bin
309cf9413e1146e8f39299e813147cc652c0b0b54cab9320eb195eb3c1fddd2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9277 10316 bytes
font_02_sfnt_off0000b5b5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5B5 4324 bytes

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