Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd4650ef265fa73…

MALICIOUS

PDF

72.7 KB Created: 2020-12-01 17:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b1ff52011f630106d99d901c69444a0f SHA-1: b8c38abdb9029b8112f129504de2c660ad132700 SHA-256: 1bd4650ef265fa73dd365c9706cd7ffdc02d827196f77e471cb41d3600db389e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ggtraff.ru, which is indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although the document body is heavily obfuscated, the presence of the malicious URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ggtraff.ru/strik?utm_term=how+to+find+the+residual+on+a+ti-84+plus In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_5fad9464514b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f9e660ce82d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf510b173fb5383b98ed27/1606373646161/vec_fc_21.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/dedifuxumalumeteti.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0baa35687f52b6b804624/t/5fc0de311972c46e3cbeae3f/1606475314348/ninja_minecraft_skin_pixel_art.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ae6a9955c744b5470351/t/5fc4e607bc819f1cf4725659/1606739463881/parable_of_sheep_and_goats_video.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf56aa3485235c86bd7507/1606375088262/jumasasufavepoga.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfcb71972c46e3c6559c3/1606286524056/finral_x_vanessa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe07e8fa04221c71e7bbfc/1606289387556/lords_mobile_mod_apk_download_latest_version.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0052111f6a4198480c96b/t/5fc25dfe3485235c86138976/1606573567178/who_gives_this_woman.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/autism_spectrum_quotient_scoring.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc009dd8787e87989674e7e/t/5fc0f5ae9ee0f32b87754422/1606481327418/75682092506.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee0d08845d09244f1502/1606282767076/vernon_county_wi_gis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13debbd14ff0dd29efe80/t/5fc30291a97599144e5b6d03/1606615698683/61795592620.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3d560f2895dc1e72903/t/5fc15f123c02f22b9d4068df/1606508307270/vaxuwirutimepaziwan.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0E 5496 bytes
SHA-256: ab423cee5786489558a8c05b125152552652adcb83cb432d2958c39438eda222
font_01_sfnt_off0000de9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9B 6364 bytes
SHA-256: 104527bf800a7a2511ae584714a9466ac98bc22cecff575f40a868122b08fcca
font_02_sfnt_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 10932 bytes
SHA-256: a1b645a20095bdeeef81f4217b4788e1c2e63438f9364b9321490c4269052704

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