Malicious PDF — malware analysis report

Static analysis result for SHA-256 01039eb497bb39d6…

MALICIOUS

PDF

41.5 KB Created: 2020-09-22 06:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be8b7ea37104d284992391445fe7008d SHA-1: dfb88d09c1d9a0cb271342317240a003dc25b5d4 SHA-256: 01039eb497bb39d62279303ca9d08e5272fc587c56c8487a16c92a265d1336a0
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL 'https://ttraff.club/wix?keyword=is+anything+really+possible' is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to lure users to malicious content. The presence of numerous other PDF links further supports the link farm hypothesis.

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.club/wix?keyword=is+anything+really+possible
    • http://kimob.identity-igif.org/uploads/1/3/1/4/131438800/449fae6f28.pdf
    • http://files.arthow-to.com/uploads/1/3/0/7/130739772/worek-maviwi-tikizitev.pdf
    • http://zanemukog.g2barnhunt.com/uploads/1/3/1/0/131070487/goxerorirezubenudule.pdf
    • http://files.relationalrewilding.com/uploads/1/3/1/6/131606818/8072294.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fe4b1f1d-e84b-4596-8072-4b63955cf75e.filesusr.com/ugd/b1b16e_4a24f2550f2a43d28ae7d414689a4a71.pdf?index=true
    • https://7c8bfc6a-5158-4c43-a792-f6bb8122b648.filesusr.com/ugd/e50c99_e6418d7ccdd54010aeef84fd86b39645.pdf?index=true
    • https://90652be8-70d3-40be-bc87-8eb3da3c3aed.filesusr.com/ugd/eddc50_acdf7f110a964dfaaace01bf21d5d08c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/ravensteins_laws_of_migration_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0482/7660/3044/files/gukunesakusojiguzawuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/manedezesopiwebedugeko.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/pubugubajagip.pdf
    • https://cdn.shopify.com/s/files/1/0482/7578/3842/files/dunmore_dmv_covid-19.pdf
    • https://cdn.shopify.com/s/files/1/0430/0190/5315/files/ribejolomubegemexesav.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3778/files/hd_wallpaper_little_krishna.pdf
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/free_index_card_template_microsoft_word.pdf
    • https://cdn.shopify.com/s/files/1/0436/8452/8281/files/asset_management_investment_process.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_off00006438.bin
15ee8efd098549a11d9e724e7614d91755ecaed97ceab416b7af630dd63ec7e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6438 5260 bytes
font_01_sfnt_off00007619.bin
c19b88123999dbad83134f59cf9945829c3d01e5c06f1d5aa33b526a859d2dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7619 10276 bytes

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