Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e14d2c5ee1ad644…

MALICIOUS

PDF

40.1 KB Created: 2020-08-10 12:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 612951fbd3cb9333a04c02a9640fe9bc SHA-1: 29e7af600d39596e5348c3a19134b89679980fff SHA-256: 5e14d2c5ee1ad6443ff52be4ac56ec0dd1428fe07683b4869c132669ee4afdb3
154 Risk Score

Malware Insights

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

This PDF document contains a link farm, with many embedded URLs pointing to external PDF files. One of these URLs, https://ttraff.com/pify?keyword=adjective+clause+worksheet+combine+sentences+pdf, is identified as a malicious redirector. The document's content appears to be a lure, likely intended to trick users into clicking the malicious link, which then redirects to further malicious infrastructure.

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=adjective+clause+worksheet+combine+sentences+pdf
    • http://files.kimberlydevlin.com/uploads/1/3/2/6/132681985/6520e09ad.pdf
    • http://files.jimhamill.com/uploads/1/3/1/4/131438038/3f7baccac24.pdf
    • http://files.ericpiano.com/uploads/1/3/0/7/130739074/mofarezizi_rivomobemula.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7220/0605/files/nisifupilavepibilekogowe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/kezibitudowesexibodozi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/files/gapisununenob.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/13189402778.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/bifapipevinurebizemugafe.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/woziwuvifig.pdf
    • https://cdn.shopify.com/s/files/1/0447/4011/6629/files/small_to_word_converter_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/bpsc_syllabus_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/18382678698.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/20977969471.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72438278193.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/cm_to_inches_conversion_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/fuseliru.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d97.bin
fe444e83c9df2c32a45f67903cb3644ed6cc38d3bc1af259f43078e4531235e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D97 5816 bytes
font_01_sfnt_off0000714a.bin
61adff4b6a870c2faf693dad4031659efdd7fad0ac8c4d92dd4ac886fea6fa5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714A 9888 bytes

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