Malicious PDF — malware analysis report

Static analysis result for SHA-256 a81cbfb97a5146f1…

MALICIOUS

PDF

45.8 KB Created: 2020-08-10 13:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2fe805d67f2687cc50ae8ea38fecb5f SHA-1: 2cad4296354a8c9fd16fbafb00670d0c605027f2 SHA-256: a81cbfb97a5146f103d7334546d951adafb6b0037319145e4951d0a285a56da4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The PDF contains a malicious redirector link and a large number of embedded links, suggesting a link farm. The document body text and heuristic firings indicate a social engineering lure to install a "PDF file reader" or update, which is a common pretext for malware delivery or credential theft. The primary malicious URL identified is https://ttraff.cc/pify?keyword=pdf+file+reader, which is known to redirect to malicious infrastructure.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=pdf+file+reader
    • http://files.fromtherootsuphealing.com/uploads/1/3/1/4/131453681/piterikagoje.pdf
    • http://files.nightsupakaroa.co.nz/uploads/1/3/0/7/130775292/zubezak.pdf
    • http://files.concreteparkingsolutions.com/uploads/1/3/0/7/130775888/7798113.pdf
    • http://files.wageandhourcalc.com/uploads/1/3/1/4/131411474/9503628.pdf
    • http://files.thefordhambleat.com/uploads/1/3/1/3/131380756/sujudiriz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/cutting_edge_intermediate_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/zudabej.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/45991520235.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/logical_reasoning_questions_and_answers_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/14700598842.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/98778153757.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/93469525678.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/32117118203.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/fitizutoduwiwakali.pdf
    • https://cdn.shopify.com/s/files/1/0449/4855/3887/files/medio_isotonico.pdf
    • https://cdn.shopify.com/s/files/1/0430/7081/6407/files/gojibujakiwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/79339369690.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_off00007857.bin
567b49ef7112939be5a6f4fed2a4af5a68c3f165106cd0b28f88091d8b30d574
pdf-font-stream PDF embedded font (sfnt) at offset 0x7857 4724 bytes
font_01_sfnt_off00008870.bin
56ed978906ce6140e66093d65db295d066f4e73c92441ebb2cb0626d1275a524
pdf-font-stream PDF embedded font (sfnt) at offset 0x8870 9812 bytes