Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ccbaa571713227…

MALICIOUS

PDF

46.2 KB Created: 2020-08-04 18:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daa5bd06babcc07e3ac0e468181d027c SHA-1: 478526960bccfca00f5ecb30276f0fa0773aa0ee SHA-256: a5ccbaa57171322788ba6b49c11ad3b2e843447f44117b00828c9aa902cf9197
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.ru). The document body, though heavily obfuscated, contains text suggesting it is a 'html5 canvas game tutorial pdf' and includes the malicious URL. This indicates a lure to a malicious site, likely for further exploitation or credential harvesting. The presence of many Shopify links suggests a link farm for SEO poisoning or to obscure the primary malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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.ru/pify?keyword=html5+canvas+game+tutorial+pdf
    • http://files.aboutmom.nl/uploads/1/3/2/6/132682093/5253853.pdf
    • http://files.legacycaengineering.com/uploads/1/3/2/7/132711961/pomudaranupifad-tidototijidodeb.pdf
    • http://judal.mbbicycle.com/uploads/1/3/2/3/132302978/b6eb9c213ee8.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/i_see_you_baby.pdf
    • https://cdn.shopify.com/s/files/1/0440/7004/3813/files/zexugu.pdf
    • https://cdn.shopify.com/s/files/1/0439/7318/1598/files/40541564147.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/24936860345.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/asme_y14_5m_1994_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/jujopupixos.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7378/files/30485597095.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6340/files/70901409131.pdf
    • https://cdn.shopify.com/s/files/1/0435/7000/4126/files/68365662789.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/fikipizolikabobifemopej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7975/files/rekozakasetowe.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_off0000769a.bin
8f1a02247adad16facddc4fbe5d311e965a8069b449bfbf0cd06e2a52d93b86a
pdf-font-stream PDF embedded font (sfnt) at offset 0x769A 5620 bytes
font_01_sfnt_off000089a7.bin
533f60dd08312efae0a32945a3f573e2de41d7e7a90a5b1f301808f32ca3480d
pdf-font-stream PDF embedded font (sfnt) at offset 0x89A7 10156 bytes