Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb22f80aa0f3e6a5…

MALICIOUS

PDF

38.7 KB Created: 2020-08-28 23:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d811c9ba72a9d7d70054e6ff463e5b19 SHA-1: a626590144a559c5de7ce0b7f2af0b084f18f803 SHA-256: fb22f80aa0f3e6a575b5255d19ad912ee929c2e50607196d912c83887ea692d6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a redirector URL, which is a common tactic for delivering malicious payloads or phishing pages. The document body, though heavily corrupted, contains text related to 'Tamilnadu 10th maths guide 2019 pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains a large number of embedded links, many pointing to Shopify, which is indicative of a link farm used for SEO poisoning 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.com/wix?keyword=tamilnadu+10th+maths+guide+2019+pdf
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/playboy_magazines_for_sell.pdf
    • https://cdn.shopify.com/s/files/1/0464/7626/3574/files/bee_movie_full_script.pdf
    • https://cdn.shopify.com/s/files/1/0433/8532/3683/files/durigikogizodavapaxupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/gewureragonefadejinu.pdf
    • https://static.usrfiles.com/ugd/b8c837_a21f28d8f01041dbaa3e5affb1b8db98.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e7c9c0c6b8a4e9dac1d6d36128f7545.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc25a47a265146d5aba92136afab4e3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_55bf3f6d318a4a059be0e1e5e90bd68c.pdf
    • https://static.usrfiles.com/ugd/b8c837_14d5b98d8a524ed79a238b69e8ec879b.pdf
    • https://static.usrfiles.com/ugd/b8c837_31d8b11be27e4e3fba4150704e3391fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_964d35a497eb428086be5af45f294145.pdf
    • https://static.usrfiles.com/ugd/b8c837_67e7acd4ca64447d8afb699521dc813a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a890250f56a84113a07372589ff5293c.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf71010f633e4f8f9dcf5413e4d7993d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce054c7d533441bb908d312701f67b71.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_off0000583d.bin
3ff2f49a5ab361e785c53cd5bc42037a19e84288e15e7e92ab9d8f2b992c7426
pdf-font-stream PDF embedded font (sfnt) at offset 0x583D 5788 bytes
font_01_sfnt_off00006bca.bin
a33535818b36e1f8a1ae66cdbb166258122f9ca2650d9a82761d05f72a317776
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCA 10248 bytes