Malicious PDF — malware analysis report

Static analysis result for SHA-256 684146e6979704eb…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 21:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7052689718469472e41024cbe9936a39 SHA-1: f1358966097d3cc0dca85ac2c9a547f0c576849c SHA-256: 684146e6979704eb96709e29b097592a60932e0f9a4aa33851e87c211384312f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=axiology+as+a+branch+of+philosophy+pdf, which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious content through a link farm, likely for phishing or malware distribution.

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.ru/pify?keyword=axiology+as+a+branch+of+philosophy+pdf
    • http://files.lizziejmorrison.com/uploads/1/3/1/3/131383860/xomavojaratunol_tumesibujiz.pdf
    • http://files.businessmeetsbombshell.com/uploads/1/3/0/7/130776272/vovadonalibes.pdf
    • http://files.jotuncap.com/uploads/1/3/1/1/131163734/zinabafedaj-zuzabibajasepog.pdf
    • http://files.bellebutton9.com/uploads/1/3/1/0/131069886/natajom_jalunewojan_fepuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/60266176835.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2394/files/bemekunakigag.pdf
    • https://cdn.shopify.com/s/files/1/0435/1819/7912/files/neluregazixawosanif.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/gapagok.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/82642008634.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/43950610212.pdf
    • https://cdn.shopify.com/s/files/1/0432/5018/8443/files/39801402932.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/untrack_file_git.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/47869174125.pdf
    • https://cdn.shopify.com/s/files/1/0429/6343/5679/files/domazi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/39062214317.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_off000060ef.bin
a73d193f1b929072b1f52200b5a56e63c2038c3ab8d676400b4cfdcf6a39ee8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x60EF 5716 bytes
font_01_sfnt_off00007470.bin
bee3c967d56342c8c3060ab42a82fe6ca101b978778d674d3f87464364f0742b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7470 11056 bytes