Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c422219820f3b32…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 20:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d839419372b458436387c3e7a5eaaf4 SHA-1: 8836cbd1bfc4bfa8227a85cb5ec5f378485490e7 SHA-256: 6c422219820f3b32a2914155b95ea0f9927d701eb1ffb97acc7f8fa3acac2bc3
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially garbled, mentions 'Xmanager for ubuntu', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation to increase visibility of the malicious content.

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=xmanager++for+ubuntu
    • http://zexitugap.ourlordstemple.org/uploads/1/3/1/0/131070487/kuvati-ruwavijuloj-polezofilumeg-padubodetemali.pdf
    • http://files.suffolkjuniorchess.org/uploads/1/3/0/8/130874566/e0e3238332.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pamuzinesikajojefex.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/5999911518.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/40962726666.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1015/files/dagagupazomuropuzog.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/contract_bidding_process.pdf
    • https://cdn.shopify.com/s/files/1/0436/9652/1369/files/ios_10._2_public_beta_4.pdf
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/mafugaredodojajob.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/koduf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4798/5053/files/managing_oneself_peter_drucker_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1251/files/liwobugidojubid.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/23153757917.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_off00006aaf.bin
7d8ae3df41fe25d5430098258f6fe50a46fe168faab5738092462dbc250d31b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAF 4996 bytes
font_01_sfnt_off00007b94.bin
e43f8b089d49e8d02094fb1fd80f8e7adcdecd82187b1514c00642a086426ff3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B94 10788 bytes