Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c008d599eb3b51a…

MALICIOUS

PDF

41.9 KB Created: 2020-09-10 12:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31bc2146c945c95ca0c29433e66ab121 SHA-1: a73df7c79d7bd7e597c4e1a3558c6ac5cdcb9d2a SHA-256: 6c008d599eb3b51ae1fe74fbc656f4da59cb65aa28d974f49df40ea724d527e3
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector (ttraff.me). The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick the user into visiting a malicious site. The presence of numerous other PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing 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.me/wix?keyword=formal+dress+black+tie
    • http://dadobag.vacationsbyreba.com/uploads/1/3/2/6/132680813/dfdfa3cc38.pdf
    • http://files.thewriteblend.com/uploads/1/3/0/9/130969148/zajonurukusuzen-dopuladal-lelekajox.pdf
    • http://geded.rumforddental.com/uploads/1/3/1/0/131070722/suvuzerazuvetuxexowi.pdf
    • http://files.ciarakidder.com/uploads/1/3/1/4/131452958/fokitutu.pdf
    • http://napowun.davidcareyimages.com/uploads/1/3/1/1/131164312/kupuxukekaxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/boris_vian_livres.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/6550880162.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/45768353837.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8723/files/bowizisitilipasebibe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2825/7685/files/88960750628.pdf
    • https://static.usrfiles.com/ugd/9d24cb_b4fb6972d7034ddeae0a86d5ac0940a8.pdf
    • https://static.usrfiles.com/ugd/99965f_2ed88cb679d84791b7db5138f6920b0c.pdf
    • https://static.usrfiles.com/ugd/df73ab_2be998a050ba4fdda98f2c2e62360be2.pdf
    • https://static.usrfiles.com/ugd/269bb8_f693fcd27f5c4002bd2ecfec63f26085.pdf
    • https://static.usrfiles.com/ugd/be19e1_bc96f524fec54426a7c2e2d24b38c240.pdf
    • https://static.usrfiles.com/ugd/b6aaa0_7f047acb83a14577948052d3b18284b3.pdf
    • https://static.usrfiles.com/ugd/4329d7_25798ba57e3b41668ba35b6e6a7f9017.pdf
    • https://static.usrfiles.com/ugd/1a89c8_2dd91aab85574a67ba27af885b735665.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_off0000671d.bin
c8419e01ee0f1e24b090adf0e7a838d135a7c07da9b9b22c92f7e9a905cdc2d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671D 5244 bytes
font_01_sfnt_off000078d5.bin
5f8a381355f1a24a937df167387422aa8a514d9b441f1ec45546c5eb705e9e32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D5 9824 bytes

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