Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d46ac0e0594068…

MALICIOUS

PDF

47.7 KB Created: 2020-08-14 17:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c52e23fa75785f18f2215dae62f0b9f1 SHA-1: 1d56e3d59cb7516d7e34308f8e773f6a693b18c2 SHA-256: 77d46ac0e059406822f3a4b530d975dc4a99f37def53098376073ab8a27e4952
162 Risk Score

Malware Insights

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

The PDF contains a lure related to an 'ssc mts admit card' and includes a link to a redirector infrastructure at ttraff.com. This redirector is likely used to obscure the final malicious destination. The document also contains a large number of links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic to attract victims. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=ssc+mts+admit+card+nr+2019
    • http://files.niaimani.net/uploads/1/3/1/3/131381679/3737d0e6f592e.pdf
    • http://files.purduedphil.com/uploads/1/3/1/3/131378990/mikewodefugog.pdf
    • http://files.healinghandsgreatsouthernwa.com.au/uploads/1/3/1/4/131437444/9564224.pdf
    • http://fivetagu.historyspeaks.org/uploads/1/3/0/7/130740072/1952632.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/7426/4992/files/bolakaxanowagaratepaxek.pdf
    • https://cdn.shopify.com/s/files/1/0428/6427/9718/files/kotogegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/dowevaxowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/mivireme.pdf
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/real_celebrity_death_photos-_warning_warning_graphic.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/bavisurofabasub.pdf
    • https://cdn.shopify.com/s/files/1/0428/3390/3783/files/78457137907.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/96704229851.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/ninavujebinesigabuxuradu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c53.bin
1ddce7ac5f0c8c9f9b4edc56962af629f903175083581f37c19455aede1c2680		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C53 5640 bytes
font_01_sfnt_off00007f59.bin
7cec0c66ab7bd4f0b8ac09102a877d5f63c08fc6c0ca48c334047729d6e7dad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 10156 bytes
font_02_sfnt_off0000a276.bin
2f24228b8778d20b365024bedc6ba1ab2ae5b5c4fff86cf8ed6e27d9ee95023c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA276 4204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.