Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd6ade0d6b5561a…

MALICIOUS

PDF

70.3 KB Created: 2020-08-21 01:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bded63e55fec2a72a8f1932fa5cd337e SHA-1: 576a5a7fbb77237d0acd752a724166b24d7f62ec SHA-256: 4bd6ade0d6b5561a165720d1bf7edc77379261f49071b389c8ec95e93d8fe456
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=bhojpuri+chhath+geet+song'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0432/1103/0683/files/bogivosubib.pdf'. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=bhojpuri+chhath+geet+song
    • http://files.field-contemporary.com/uploads/1/3/0/9/130969942/tilumedimuf_sazerelalunej.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/bogivosubib.pdf
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/67859220915.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/adolfo_lopez_mateos_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0438/0783/4272/files/55175074964.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/5035488068.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7644/files/cours_administrateur_systeme_windows.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/sewage_treatment_plant_project.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/esv_study_bible_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/adobe_flash_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3062/files/jazekazepefevoxos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/oxford_discover_4_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/69515435868.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/biostar_handbook_student_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/8453/0343/files/mp3_player_juice.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce4c.bin
be6092047d159deb546f6f8f2835597edff2566e46f6271f12210918df3742a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4C 5288 bytes
font_01_sfnt_off0000e04a.bin
364d9a0071459e7375426bfcc66934f9dd216a4763d569f9536554e83c8997f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE04A 14244 bytes

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