Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7e3009b8f2e471…

MALICIOUS

PDF

59.1 KB Created: 2020-09-01 02:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06c3cd06b1851b434922215be74e3a75 SHA-1: b100619f138e3681d27a1cda748ab711cb1fe18c SHA-256: 0e7e3009b8f2e47183c494f4e6b021853824491a57bae376454ecc65b98ff5ff
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, appears to contain URLs and text related to the topic of email address validation, likely serving as a lure. The presence of numerous external PDF links suggests a link farm or redirection strategy to obscure the final malicious destination.

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.com/pify?keyword=email+address+format+validation+in+javascript
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0c41e7_df0e55ef1d3a4905b13a8e46d32db6cf.pdf
    • https://static.usrfiles.com/ugd/6924eb_0be3500577574568abd96db77682a2d0.pdf
    • https://static.usrfiles.com/ugd/ca300b_85058e93b07e4737a064ac0796e19ea2.pdf
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/fobisefikumaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7776/files/92918064555.pdf
    • https://cdn.shopify.com/s/files/1/0439/1672/2344/files/kelanijupewaxatutiwuvof.pdf
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/installing_and_configuring_windows_s.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/1890683245.pdf
    • https://static.usrfiles.com/ugd/b9801a_99bae4285e784b3c82370c2fac4fa598.pdf
    • https://static.usrfiles.com/ugd/3aee12_cf2dbbc9b05a42fbb50450357ed29e4c.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/black_s_law_dictionary_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/critical_thinking_for_psychology_a_student_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0407/5933/files/96016576988.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/79537107731.pdf
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/vias_de_absorcion_de_los_farmacos.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ae2.bin
76b189f1c4514a466366031d7f39d7da35e8bdc6551cfbac00c464fb3a8a3a52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE2 6220 bytes
font_01_sfnt_off00008054.bin
3dd9ac4d4bf5036542ef485b01eb61a3a59ba3bbff4f04990d5d224ba383586f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8054 5392 bytes
font_02_sfnt_off000092a7.bin
1ea2f127d7600680fd74b3fe5f0f7eebe7011bb1db91ef81461b7ad087dddbf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A7 15644 bytes
font_03_sfnt_off0000c4f6.bin
238167404b1eb8d9a703049bf85734aac9d7eff9ee242a2000d9ebd8231a25e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F6 17388 bytes

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