Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e25df5beb11100…

MALICIOUS

PDF

36.9 KB Created: 2020-08-31 14:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a438d9a76d91ccbbf23b043a79bb2ac SHA-1: ba1705d80939096c7fde3162275126deba5ac75d SHA-256: 68e25df5beb111005f1b8cf71336ede4d04b83eea2a705ddcbc6426f5cd423cd
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm designed to distribute SEO-optimized PDFs. One prominent link redirects to `https://ttraff.ru/wix?keyword=alka+seltzer+rocket+lab+report`, which is identified as malicious redirector infrastructure. The document's structure and embedded links suggest an attempt to drive traffic to malicious sites, 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=alka+seltzer+rocket+lab+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/9883/8942/files/nabutaxavu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5832/files/bojugokiwujasusodop.pdf
    • https://cdn.shopify.com/s/files/1/0434/3595/0236/files/flat_tops_wilderness_guides_reviews.pdf
    • https://static.usrfiles.com/ugd/b8c837_e07d4dac6c58470da4d7a93ed202c461.pdf
    • https://static.usrfiles.com/ugd/b8c837_275931a6218d46978e50a8921bcc6fe1.pdf
    • https://static.usrfiles.com/ugd/724fb5_417e7db49df04791a452a14b3e62835a.pdf
    • https://static.usrfiles.com/ugd/57c819_fea64aac614d4766a191cf1cc24d3f25.pdf
    • https://static.usrfiles.com/ugd/cdb50c_3bd5b09c6acb417f89c447d670b21d2b.pdf
    • https://static.usrfiles.com/ugd/3615fb_97fa69653dff4f108b82f0b5d81a2b8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3279adcd308141108f647b98d0b30610.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/84956190237.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0245/files/arinc_429_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/2693/9042/files/article_15_movie_english_subtitle.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/wefobi.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_off00005347.bin
df5755165f3c70fa0cf662e33ddd24b72641e64c0ba418f1b84b389282dc962c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5347 5168 bytes
font_01_sfnt_off000064ee.bin
5708b503fd5444b3a7cd4117cc26aa621afbce5adcb433ba9a29c57d85599363
pdf-font-stream PDF embedded font (sfnt) at offset 0x64EE 10064 bytes