Malicious PDF — malware analysis report

Static analysis result for SHA-256 68740e04c26dafbd…

MALICIOUS

PDF

44.2 KB Created: 2020-09-01 09:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7e4ebcd96ee1455814cea54123ccd05 SHA-1: df80e88d46e73fc74043a80279cb2fd4b027d972 SHA-256: 68740e04c26dafbd3c271af6f5b7e3a82299e999e061445185a4c8a99476ae0e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a recipe search, suggesting a lure to disguise the malicious intent. The presence of a malicious redirector indicates an attempt to lead the user to a harmful 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.cc/wix?keyword=thalapakattu+chicken+biryani+recipe+in+tamil+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/unanswerable_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/almagestum_novum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.pdf
    • https://cdn.shopify.com/s/files/1/0437/7224/8215/files/63353797583.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/ncert_9th_class_english_textbook_beehive.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/34286682018.pdf
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/swimming_goggle_lenses_color_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/nufemezuwugovemafefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0210/files/nobubupefupo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4093/7896/files/aristteles_potica.pdf
    • https://static.usrfiles.com/ugd/dd4472_2fa3a7c06ef044e181c14975495d0677.pdf
    • https://static.usrfiles.com/ugd/7f16bd_3caa265887a0490ebf964141c74585f3.pdf
    • https://static.usrfiles.com/ugd/6260fe_af9a7a549ec84467a5953565241dfef7.pdf
    • https://static.usrfiles.com/ugd/2274a7_26cb01f9d0554309bdb27366ab012fbb.pdf
    • https://static.usrfiles.com/ugd/3fc21f_2106bd8daebc4b08b7f606c6d56dc46a.pdf
    • https://static.usrfiles.com/ugd/fe83c3_0223c3f0ed34405db7c354e992d14984.pdf
    • https://static.usrfiles.com/ugd/277b62_cb8b6df929074a1ca34c05d9782f8d7e.pdf
    • https://static.usrfiles.com/ugd/5360f8_e72e5dc476f94092bc4e21407892d6e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_4edfeac9870e4392bf67c77766a62750.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_off00006ea9.bin
879077cc01e8335290bb031eb8199d7830060601d62a94be1d21696adb703b5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA9 5472 bytes
font_01_sfnt_off0000811c.bin
a250fca4ac79dc393386f727928da2f1941314dd66ff01cb403065fa2293fd05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x811C 10060 bytes

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