Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b85d0ff5f5f26e…

MALICIOUS

PDF

70.7 KB Created: 2020-12-22 14:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b6617a4c03d5c0b94d2a1efaedabc5a SHA-1: d13620856613be3a46c70713cae51da9fa27d323 SHA-256: 26b85d0ff5f5f26eba0384ccc501f5c6600eac5158f7ce29c70f35fec2a8a588
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=ortel+mobile+flat+tarife'. This URL is presented within the document's body text, disguised as a mobile tariff offer. The ML classifier also strongly flagged this PDF as malicious. The combination of these indicators suggests the document's primary purpose is to trick the user into visiting a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffmen.ru/strik?utm_term=ortel+mobile+flat+tarife
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jidosatikim/lexekepebide.pdf
    • https://s3.amazonaws.com/nagudo/beer_bottle_labels_template.pdf
    • https://s3.amazonaws.com/kavitokolezub/principles_characteristics_and_features_of_procedural_programming.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf1e93fdc31513a0e972b/1606218219203/dead_and_gone_ti.pdf
    • https://s3.amazonaws.com/ropuba/automate_or_android_auto.pdf
    • https://s3.amazonaws.com/mibiwivanetuj/nawitakuwutujipamadatex.pdf
    • https://s3.amazonaws.com/xenavuxa/aryabhatta_biography_in_hindi_download.pdf
    • https://static1.squarespace.com/static/5fe00322ff074777c9865bc0/t/5fe120787863ed53a3e93367/1608589432761/wumawadazodarikijimok.pdf
    • https://s3.amazonaws.com/midipes/vupamelekadisu.pdf
    • https://static1.squarespace.com/static/5fe0137e2dcd53187f21ff62/t/5fe0dfc09e074e6f3cce83a1/1608572870079/pudixodetedikujonalijuboz.pdf
    • https://s3.amazonaws.com/xalasawu/hungry_dragon_game_mod_apk.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf58204e98326c0207ad12/1606375461046/suwedosifuwotewuwaropig.pdf
    • https://static1.squarespace.com/static/5fc6d0c6791da6493f6663f7/t/5fc9d23f81b71b4085976089/1607062080125/just_a_bunch_of_hocus_pocus_shirt_target.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_off0000d711.bin
929cac1074037fec9b577a3da1f6dbfab12e8994b13388dac4d8e6009a02fd27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 4904 bytes
font_01_sfnt_off0000e7a3.bin
ead3dcd28a4bdf87098a250a457d0c182b4a80e5df64c820cbf1beac97aff284		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A3 10880 bytes

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