Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52df694e25a2492…

MALICIOUS

PDF

52.2 KB Created: 2020-08-11 15:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20ee9ea9f1c509ccd920a7435722e291 SHA-1: cd34956f6d9c42cc9b8c809cfd6bd0cd81b91e06 SHA-256: e52df694e25a249284e3518d0214435926c37443328c3565f02a860737bcf323
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This link, 'https://ttraff.cc/wb?keyword=passau%20city%20map%20pdf', is presented within the document body, likely as a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a broader campaign to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=passau%20city%20map%20pdf
    • http://files.triplethreattestprep.com/uploads/1/3/2/6/132695620/woxumiwigigimolewun.pdf
    • http://wugopaxa.gameaccess.net/uploads/1/3/1/4/131453870/bowekobisewem-rofemamivok-tarazunonovuk.pdf
    • http://files.palmettopreswm.com/uploads/1/3/1/4/131455636/sodinirogat_febabanisi_gotazapub_gowur.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/the_bedford_reader_13th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/american_standard_furnace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/ninubuveteguraduraviw.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/7719828659.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0434/5554/5497/files/vexudemeropuruxuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/2024/7462/files/47275374243.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/godzilla_unleashed_wii.pdf
    • https://cdn.shopify.com/s/files/1/0436/5657/7182/files/discovery_of_auxin.pdf
    • https://cdn.shopify.com/s/files/1/0431/9176/3105/files/fevelovobukeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/90073055951.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/games_of_thrones_map.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5341/files/98188597632.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083b5.bin
470b8a7717ff3034502b9abde0d9c0d909589b770dde42a10bd181f522b43bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B5 5276 bytes
font_01_sfnt_off0000959f.bin
f5ae482200f1671a2590b507b22a7f81f29f685a2932bcd74681ef6a762f67f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x959F 14884 bytes

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