Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d17e57703506846…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 17:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1254513364bb2911638d0118ab195fed SHA-1: aa3e74665eb3747fe79168813e6a8ea20c5efef3 SHA-256: 7d17e5770350684625d27691945ce35dfa1fa1027da7c49c7db6a9d8088c25a1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, many of which point to a link farm designed to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=fonterra+fy18+annual+report'. The document body, though heavily obfuscated, contains text suggesting it is a financial report, likely a lure to encourage clicks. The presence of multiple PDF links and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=fonterra+fy18+annual+report In PDF document text
    • http://bigef.untermyergardens.org/uploads/1/3/1/4/131453197/2805276.pdfIn PDF document text
    • http://files.laceyandleatherexoticattirellc.com/uploads/1/3/1/3/131384489/1091555.pdfIn PDF document text
    • http://files.askpapabear.com/uploads/1/3/0/8/130873983/vukonozuruvikapewid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/67873788407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1695/3767/files/jemizamumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/kopesiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8383/3249/files/30008770345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0418/files/39696646586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4484/7266/files/2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0517/1096/files/73065367867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7157/2885/files/natural_draft_cooling_tower_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/7078/3393/files/asbab_al_nuzul_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/90461660749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/xasitivos.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c02.bin
e2afe6d0ba6d026e23f9f7ffa4961430f977ea42c88009a032a7d443e686df0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C02 5020 bytes
font_01_sfnt_off00007d37.bin
fbd49cb0b1e5011ec6fb4db0bd81c5a3cbef50ab2a1980e4e77d6b3e7108872a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D37 11900 bytes

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