Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f331e1dd4cc2d24…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 16:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5d20714d261d64c93453d9895747553 SHA-1: 13d4531b1b88605dca6779cfe3ff474f31711850 SHA-256: 0f331e1dd4cc2d24f2f2d9460c2ed358c71e0344d141c273cc7cc43e36011c83
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external resources. One of the primary links, https://ttraff.ru/wix?keyword=cual+es+la+importancia+de+los+canales+de+distribucion, is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to malicious infrastructure, likely for phishing or malware distribution.

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=cual+es+la+importancia+de+los+canales+de+distribucion
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88490435411.pdf
    • https://cdn.shopify.com/s/files/1/0430/9444/2137/files/80729247303.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/93051133703.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/aumentativos_e_diminutivos.pdf
    • https://static.usrfiles.com/ugd/b8c837_62ead4b5d7db4e8381977a53c9133e96.pdf
    • https://static.usrfiles.com/ugd/0f1814_fb86b23aa2d24186ad2f6dadd7490814.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_256fb18dd115408b9b4fdbd5e46be6e6.pdf
    • https://static.usrfiles.com/ugd/565485_9d9279afe5594f0393b81133891e4066.pdf
    • https://static.usrfiles.com/ugd/47b1e8_17d9e081c95e43d5bfaddb010877a82f.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/56282152327.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/vimukagemes.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/penoberamavavalejumeno.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/circumference_and_area_of_circles_worksheet_key.pdf
    • https://static.usrfiles.com/ugd/6f53d7_d41121022f7b483aba83c3e643b22a0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_116f9e7c5bb14586972edbc3ed1e0a6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a0c8d55a448421a8388470bbb5c2218.pdf
    • https://static.usrfiles.com/ugd/a31856_1fded58501474ea28cbdd32afbe979a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0eb0e77a0ce34d7fbf99dfe246adae0b.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_off000065e2.bin
96d5dd74318d53a732cedb70c23c7e8eead1104893283826410f3e6c8adb50a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E2 5264 bytes
font_01_sfnt_off000077a2.bin
fe3e567a90ee997c9841385a7f25ce93bde4ee0d8316c87a123cb10c43f86af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A2 10696 bytes

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