Malicious PDF — malware analysis report

Static analysis result for SHA-256 084e54b0751f1388…

MALICIOUS

PDF

36.9 KB Created: 2020-08-26 00:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 380884eb6456c0b82e7c4acd8cb5d73a SHA-1: 9fea50b779c92dae1739fcdfb6bda734740f0b70 SHA-256: 084e54b0751f1388d730315eb33324ed21c406392ad518e82f8934ba65e7cc89
154 Risk Score

Malware Insights

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

The PDF contains embedded links that are part of a link farm, with one critical link identified as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests an attempt to trick users into visiting a malicious site under the guise of a free download.

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=david+wilkerson+the+vision+pdf+free+download
    • http://kobalobew.sccliteracyproject.org/uploads/1/3/0/9/130969723/banisekuvezevo_lojodoj.pdf
    • http://files.backtobal.com/uploads/1/3/1/6/131606261/zazavunexo_wezuxukadunip.pdf
    • http://zitov.lingg.us/uploads/1/3/2/6/132681579/8c899d9c73af.pdf
    • http://sosose.valiantfew.org/uploads/1/3/1/4/131437502/wapijevaxo-posaza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/13577027951.pdf
    • https://cdn.shopify.com/s/files/1/0429/7703/4399/files/69349625706.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdf
    • http://wudik.shojitabuchigiftshop.square.site/uploads/1/3/0/7/130739017/9197569.pdf
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/sepabexezereguselij.pdf
    • https://cdn.shopify.com/s/files/1/0444/5346/2183/files/bookman_old_style_italic_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/laudate_dominum_mozart_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/dokebe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0398/5570/files/fojafidikegip.pdf
    • https://cdn.shopify.com/s/files/1/0432/6529/4491/files/pixilonamemamex.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_off00004fc6.bin
8373c0dadeddf18aabc967e37b0f4176fded40f5f9450311c04d8bcfde713b56
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC6 5344 bytes
font_01_sfnt_off000061ff.bin
5eeffd68dc89699bfbf6c3b64af89898cede7521d896d3d406f2390128d8cb5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x61FF 10724 bytes