Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebfb79c224e0aef…

MALICIOUS

PDF

49.0 KB Created: 2020-08-14 21:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37b5dc3e95bd80d087740c00049f65cc SHA-1: 7a6995a7742867dc63050ebf44f73ad130f47f10 SHA-256: 9ebfb79c224e0aefbfed90e1ede74a54784ddfafe8399adf836b772c4d02f562
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure for 'Dark crystal full movie' and embeds multiple links. One of these links, 'https://ttraff.cc/pify?keyword=dark+crystal+full+movie', is identified as a malicious redirector. The PDF also features a link farm hosted on Shopify, with one such link being 'https://cdn.shopify.com/s/files/1/0429/5258/9465/files/xuwabax.pdf'. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed for malicious redirection.

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.cc/pify?keyword=dark+crystal+full+movie
    • http://files.nickcharlesmadson.com/uploads/1/3/1/3/131383434/00ff6614b9.pdf
    • http://files.leighcooney.com/uploads/1/3/1/6/131606431/b868a.pdf
    • http://files.zedhandmade.com/uploads/1/3/2/7/132740329/4652765.pdf
    • https://cdn.shopify.com/s/files/1/0429/5258/9465/files/xuwabax.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/gamumopunojelidawitupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/novel_best_seller_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/15488986253.pdf
    • https://cdn.shopify.com/s/files/1/0432/3688/4642/files/benimudebimovexetel.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3851/files/cazadora_de_hadas_2_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/raxiwedeketafas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/14081766178.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/wuvekusizarezujuwakafikon.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1111/files/plywood_workbench.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27984898694.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/dasufavope.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_off0000821d.bin
bc8017b10bbe607072c9adaeda786b61d386725e3878d59d0a9d37cacb3d4e62
pdf-font-stream PDF embedded font (sfnt) at offset 0x821D 5252 bytes
font_01_sfnt_off000093f8.bin
2815dfe6f7e2ad68cbb151acd9b4d5a8fe1c9f4ea9cfea4f9bf46bfe361eb880
pdf-font-stream PDF embedded font (sfnt) at offset 0x93F8 10352 bytes