Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a13d7b8521e37c…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 08:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b0a5f6f183b357a871ff9af73f79a61 SHA-1: dd88a45627c1f304d91e70847f91bccbdebec077 SHA-256: 08a13d7b8521e37c5ae7e1f04ab3d719b7c9a4031ca25bc6999503cdacf54cf3
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a malicious redirector, disguised as a download for software templates. The heuristic firings indicate the PDF is designed as a link farm, directing users to potentially harmful content. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely to lead the user to a phishing or malware download site.

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=premiere+pro+cc+2017+essential+graphics+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/30815544364.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/lotixasinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6992/2714/files/34493044959.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/kiliminajugekeludol.pdf
    • https://cdn.shopify.com/s/files/1/0432/2787/3440/files/favepenevuvikakalurawe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/wujazobekibilokojupitu.pdf
    • https://static.usrfiles.com/ugd/07625c_a60c8330d7444eed83142cf4a68548b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_92d14305228349b79a9fa88ff53bf428.pdf
    • https://static.usrfiles.com/ugd/b8c837_8966cdd46d774439b8575ae65da3d8bf.pdf
    • https://static.usrfiles.com/ugd/d775a9_9b4f27e8d031449fb803693c71d88164.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/lagixekisokavivupulisiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/4528/2214/files/bluestacks_developer_options_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/zefejolifutumejolopideli.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_off00005f77.bin
d0c362145e0167ae4424909fe04642b120abadc5ec0a31dfd5980e6cde31c2c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F77 5752 bytes
font_01_sfnt_off000072de.bin
abfe292329321d025be3f773936c50fcf827fe97f31a7991a5d4b3040ff058e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x72DE 9848 bytes