Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f02fcaa4d90f6c…

MALICIOUS

PDF

45.3 KB Created: 2020-08-30 22:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1102e7c8ea1d74488f7aecba029970a SHA-1: 88c34bd49c03cefdceda0c332ad0c9072008a6e1 SHA-256: 60f02fcaa4d90f6c066f93f301ae32a94c824a8678ce8f05ca730b81f4929e6b
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.cc, which is likely intended to lead the user to malicious content. The PDF also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are hosted on static.usrfiles.com. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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/wix?keyword=cultura+popular+definicion
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/eaf48f_06272c833883463bbd5f2749da81e27d.pdf
    • https://static.usrfiles.com/ugd/162fe6_bf758cb6419e410889503c93f5fb052c.pdf
    • https://static.usrfiles.com/ugd/0adedf_4bf79b90fd0e4a67900014780cabf68d.pdf
    • https://static.usrfiles.com/ugd/c068f8_8a901ec697934faca2a7e72f8f4e388f.pdf
    • https://static.usrfiles.com/ugd/b8c837_5eed99d82ee74410ab42ccda4f97eaf5.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_4191ddf811f34f2e8e17db6d1f4f8741.pdf
    • https://static.usrfiles.com/ugd/b8c837_46a55330e7064069b522c10be6581866.pdf
    • https://static.usrfiles.com/ugd/a91264_542ad411429f45dcb760136b2c722307.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/digimon_world_3_free_download_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/xanefifuxoditejogok.pdf
    • https://cdn.shopify.com/s/files/1/0436/5769/1294/files/68714118840.pdf
    • https://cdn.shopify.com/s/files/1/0463/1196/4829/files/78019911983.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7384/files/nenepe.pdf
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/mulovozefisinopivok.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/males_seeking_males_snapchat.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_off0000636e.bin
52b3b1b9af1fae4784a4cafc5495b134253d016a91b0dba3fd0c99acedc07641		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636E 4876 bytes
font_01_sfnt_off00007414.bin
a87203b7e953caed415cd53fc3f28fe2678ec2324b7fbb3740d0cf85b8d27575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7414 11492 bytes
font_02_sfnt_off000098a9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98A9 4324 bytes

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