Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8d86756337fa41…

MALICIOUS

PDF

41.7 KB Created: 2020-08-23 01:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09ea206d8e1b3068f545fff5b58a8602 SHA-1: 66f9e0b683459143610e9f8454cea8cae108e4da SHA-256: ed8d86756337fa419fd4fbdf9bc5e714ca0cb256f3b1cfacd9c6934259f2d969
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=how+to++peloton+app+on+firestick', is identified as a malicious redirector. The document body also contains this URL, suggesting a lure to trick users into clicking it. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=how+to++peloton+app+on+firestick
    • http://xiwodi.senjistudios.net/uploads/1/3/1/4/131482916/kalozinuriweg.pdf
    • http://bixerof.naonsandiego.com/uploads/1/3/1/4/131453870/bumivuje.pdf
    • http://files.connoisseurstours.com/uploads/1/3/1/8/131857071/abaa266e7dc9a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxolalinurijelibabozafod.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5267/files/14017276767.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/how_to_show_coordinates_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/xarebi.pdf
    • https://cdn.shopify.com/s/files/1/0446/1504/1187/files/suprapubic_catheterization.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/95363464692.pdf
    • https://cdn.shopify.com/s/files/1/0450/2398/5828/files/wigonixapu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/giruzezakoniv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/18106544405.pdf
    • https://cdn.shopify.com/s/files/1/0433/0828/6105/files/vinayagar_agaval_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/voralonapipabe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3176/3864/files/camtasia_8_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/nesuj.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_off0000656e.bin
0d108b421a218fbb0a36baba9aaaa5240c3daa98e7eba4f01f3e81fdce30e4ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x656E 5124 bytes
font_01_sfnt_off000076fd.bin
eaab31ffaf2014599f71dfe72f4efc4ec7e008c44b2dbfb569e3965ac1785dc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x76FD 10284 bytes