Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d4dbc167787a0a…

MALICIOUS

PDF

56.1 KB Created: 2020-08-20 13:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 235e7daec57ba08c9448f5fc8d37bd19 SHA-1: e7b9029c0e15201a01edf87548f2ee6794aff7db SHA-256: 58d4dbc167787a0ac835d4de7ef16c96a7b88dcc48fba087a9c07fd6e5c56398
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The primary malicious URL, https://ttraff.com/pify?keyword=haunting+of+hill+house+episode+guide, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to the lure and the malicious URL, reinforcing the phishing intent. No scripts were extracted, but the PDF structure and embedded links are sufficient to classify this as a malicious document.

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=haunting+of+hill+house+episode+guide
    • http://files.vanpickuppr.com/uploads/1/3/0/8/130813694/bupoxozewe_nafob_wujuxa.pdf
    • http://files.fryeins.com/uploads/1/3/1/4/131437885/xetiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/ncr_atm_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/85558510245.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0944/files/room_acoustics_kuttruff.pdf
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/mefegasevemiwa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7101/2006/files/koxofafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4469/9288/files/barrenadora_portatil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/20110622903.pdf
    • https://cdn.shopify.com/s/files/1/0432/8970/6664/files/keirsey_temperament_sorter_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3576/files/schindler_s_list_main_theme_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/buscopan_simples_bula.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_off00009fb6.bin
f988b9a3cc2237141a5c79c8166a92228b2f62b8cf1352f6a2146c59520a67bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB6 5168 bytes
font_01_sfnt_off0000b14c.bin
2de1459846358839b49b65adeed7ca9989b6dab205c9638ef39f7b7f97e0d1f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xB14C 10140 bytes