Malicious PDF — malware analysis report

Static analysis result for SHA-256 1062b20f76401494…

MALICIOUS

PDF

66.4 KB Created: 2020-09-01 21:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac9072bc1251e9295586e32e4f6b7816 SHA-1: 97547b1b42a67dad93609980f60a75366ca49ce4 SHA-256: 1062b20f764014948ca4bad12aa627ea1d71f652110d8c9e9e209ba748d89478
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document also features a large number of embedded links, many pointing to Shopify, suggesting an attempt at SEO manipulation or link farming. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=conduction+convection+radiation+worksheet+key
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/70532721249.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/25040824849.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/zesuxofabusofubepibiri.pdf
    • https://cdn.shopify.com/s/files/1/0437/4442/8181/files/26034078549.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/pokemon_explorers_of_sky_aura_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/ziwew.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/portuguese_language_to_english.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/microsoft_word_2019_calendar_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/0859/7927/files/sedufudadejubefebozesexog.pdf
    • https://cdn.shopify.com/s/files/1/0464/7449/4104/files/8499051210.pdf
    • https://static.usrfiles.com/ugd/314c35_7370baa0eb554d5490dacb94dfae29c6.pdf
    • https://static.usrfiles.com/ugd/8e1900_cd4b7f1cde87454ea65a7f9fb2d54d14.pdf
    • https://static.usrfiles.com/ugd/0a593f_744db6a469c7440682b9acdfab761028.pdf
    • https://static.usrfiles.com/ugd/ae15ca_e261ccc3a582453fb31812c545beeee9.pdf
    • https://static.usrfiles.com/ugd/a382ee_d9960c9a4a164326961b48fe51c2820c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bddd.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDD 2828 bytes
font_01_sfnt_off0000c7d7.bin
28bd8c4ec706e9ade309608486e9cca4610b31ccf77c430bfb7f7c0af89b83ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D7 5216 bytes
font_02_sfnt_off0000d9a8.bin
7377e85c38ca76948932bac6bd6aafae7525cfb7f277ed49a19f0e7f24352246		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 10000 bytes

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