Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d0b72001e21d54…

MALICIOUS

PDF

40.7 KB Created: 2020-08-25 12:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8e1cc6441a72df14e424e44b5815755 SHA-1: b677d5185e797a241b0c85aecbd9d9ca49d7a592 SHA-256: c1d0b72001e21d544b08166e0f1870b220c48063d7f3925c1d386902a20d003c
128 Risk Score

Malware Insights

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

The PDF file contains embedded links that are part of a link farm, with one critical link pointing to a known malicious redirector. The document body and heuristics indicate a lure for an 'Adobe reader update', which is a common social engineering tactic. The primary malicious URL identified is https://ttraff.com/pify?keyword=adobe+reader+update+version+11+free, which likely serves as the initial stage for delivering a payload.

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.
  • 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
  • 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=adobe+reader+update+version+11+free
    • http://nuwera.tuam.coralleisure.ie/uploads/1/3/0/8/130813765/lelugorisazum.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/calf_workouts_at_home.pdf
    • https://cdn.shopify.com/s/files/1/0447/3189/1861/files/15115185298.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/varut.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/minecraft_witch_drops.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/96206565051.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/jutat.pdf
    • https://cdn.shopify.com/s/files/1/0465/2947/8806/files/german_book_of_mormon.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/puvojeg.pdf
    • https://cdn.shopify.com/s/files/1/0464/6676/0856/files/crossword_puzzle_answer_pageant.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6657/files/mewesetivosuxumukegi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8389/files/robasepapuzes.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_off0000613c.bin
d6b4a368ddced91b7d8d9f26c2d4616232da87fcc6a42f9cdc3d7e2c3af6c75a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613C 5244 bytes
font_01_sfnt_off00007327.bin
546fcfe683b96209c372d0dc1eb63ab5c6bd80b60dfb4d203a64e4443e6f41f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7327 10324 bytes

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