Malicious PDF — malware analysis report

Static analysis result for SHA-256 85af32c27d88af60…

MALICIOUS

PDF

212.6 KB Created: 2021-01-08 09:19:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b806a7df4b1bbc2d185da242856a05f4 SHA-1: d160210c284797579077a4795695413714adc58b SHA-256: 85af32c27d88af608f20ce32d6d615ea3a1ec6befe9579a69a79349088b68edf
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=bhagavad+gita+short+summary+pdf'. This indicates the document's primary purpose is to lure users to a potentially harmful website. The ML classifier also flagged the PDF as malicious with a high score. While no scripts were explicitly extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8150

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/aws?utm_term=bhagavad+gita+short+summary+pdf
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f8df569695c0.pdf
    • https://kadezejuvi.weebly.com/uploads/1/3/4/6/134603763/bofevilazelewizoger.pdf
    • https://vavawuzozut.weebly.com/uploads/1/3/1/1/131163550/gilafimemuz-wizamixofazub.pdf
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5fbb0c7324369.pdf
    • https://juluvolalo.weebly.com/uploads/1/3/4/4/134435755/vevagorizitaxum_gojozen_vijukugo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/kabisebax/install_apk_on_android_devices_adb.pdf
    • https://s3.amazonaws.com/wizuluworafid/sezikilo.pdf
    • https://s3.amazonaws.com/rurosaveruk/gmat_sentence_correction_questions_and_answers.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/lemon_yonezu_kenshi_piano_sheet.pdf
    • https://s3.amazonaws.com/nuxomigo/68061919479.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c258.bin
604725ebf9bf0d9ab2bcf42cb3b9eb1946ba017bf99d5c2e6531ff47cfbc4b7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C258 2888 bytes
font_01_sfnt_off0002cc9b.bin
14aa29aa8d4e0e73387aa9d782621a87cc8cfe260f49698651a47cee0cd8ce23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC9B 5632 bytes
font_02_sfnt_off0002dfaa.bin
eb903a4bcabb0673128613fc2c6a3b3be6b6be0204d11159aa2f590e1d82ee93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFAA 3740 bytes
font_03_sfnt_off0002eb23.bin
49e3bc5c7c1a199a747333f9f2df5364806eb02c28eedf9a1edf30f6017d70cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB23 14560 bytes
font_04_sfnt_off00031686.bin
8a02c072109af67031be64374fa0b0107fc8569691e792053b23713e8e8f99b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31686 16164 bytes
font_05_sfnt_off00032be0.bin
3582c26552fabdaf47e37fbc20308a1ff357da20e8a822e1a111e00cf80590c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32BE0 6672 bytes

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