Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f7fccbe6fbd050…

MALICIOUS

PDF

55.2 KB Created: 2020-09-07 09:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d05c55535ec4e6dfc74c268e50f9815 SHA-1: 0cde5cf8dec94dd48b863076b30b74f36237accc SHA-256: 00f7fccbe6fbd0509c2564f30f6e9336b39488e01a0855468cfd5f9a48d37c21
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF document contains a large number of embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links, 'https://ttraff.club/wix?keyword=free+customizable+2019+calendar+template', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users with the promise of a 'free customizable 2019 calendar template' to a malicious 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.club/wix?keyword=free+customizable+2019+calendar+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/marketing_funnel_template_google_slides.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/netiwomovak.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2369/files/cattle_breeds_in_ethiopia.pdf
    • https://cdn.shopify.com/s/files/1/0447/9755/8941/files/catalizadores_positivos.pdf
    • https://cdn.shopify.com/s/files/1/0437/6218/8449/files/19221413111.pdf
    • https://static.usrfiles.com/ugd/a3b54b_6fc3e5de5a174ec0838cbf5ff055fee5.pdf
    • https://static.usrfiles.com/ugd/696b8a_a84ac9b140134c569c98cae825bc56c6.pdf
    • https://static.usrfiles.com/ugd/610d21_cb3d309c90bd481199da1fd61331c61a.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/swerve_driving_school.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/visonewe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0636/files/mesavenuzazotidosesow.pdf
    • https://static.usrfiles.com/ugd/eda9ba_025a8af871534b4ca436c189f309b57e.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_cfb8f21e0700401d83b86a777d8f8299.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_off0000986b.bin
45fbcc83bf1abad16bfaa9c71d2d15f3b4551e44ea7af8ec9e4e2d11e0a70b65
pdf-font-stream PDF embedded font (sfnt) at offset 0x986B 5848 bytes
font_01_sfnt_off0000ac3b.bin
c37e4668134e5c3286850e288b6c8d47e939bbb072f46c53160f72a94a713121
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC3B 10536 bytes