Malicious PDF — malware analysis report

Static analysis result for SHA-256 132158feea61cd0d…

MALICIOUS

PDF

42.1 KB Created: 2020-08-29 22:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1052516572642712845070172ab9ba96 SHA-1: f4792525e4e7ce47919484d64d9c462da54c4ffc SHA-256: 132158feea61cd0dba9161463fb254af94ac68d9546dc048c9e6c8b4e379c0d6
162 Risk Score

Malware Insights

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

The PDF contains a link to 'ttraff.ru' which is flagged as a malicious redirector, likely serving as a lure for users seeking to watch movies online. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous other links, many pointing to benign PDF files, suggests a link farm or SEO manipulation tactic to increase visibility.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=sing+full+movie+online+free+putlocke
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_e3f6b4ee8161407194d91592018acd25.pdf
    • https://static.usrfiles.com/ugd/432b07_6374105872674e27b7b257c706bd4660.pdf
    • https://static.usrfiles.com/ugd/b8c837_84d57bfd287a4c5ab69d3ef4287faab9.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/siemens_busbar.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/google_adwords_certification_fundamentals.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/44944197597.pdf
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/sedurinewevup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/how_to_copy_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0447/0921/6409/files/dubafiwokogaxaromotobevu.pdf
    • https://cdn.shopify.com/s/files/1/0466/3033/8725/files/91779706444.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/auksinis_protas_knyga.pdf
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/76692279311.pdf
    • https://cdn.shopify.com/s/files/1/0432/2148/3687/files/1092765853.pdf
    • https://cdn.shopify.com/s/files/1/0431/6934/9794/files/19699505449.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_off0000669c.bin
f216ec533d001815d204906eeb54a9b4d3ffcccf631ddeffee6e74778cddfcbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669C 5172 bytes
font_01_sfnt_off0000782d.bin
42fe5edf263b19ecaaea99945dcfc56e502eef145d2e8df97611fdbda70d85f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782D 10196 bytes

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