Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8ee4c6e52cf62e…

MALICIOUS

PDF

42.9 KB Created: 2020-09-10 19:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a81b81e26631394b2de193fdcad87f6 SHA-1: c8774852991de37c577338b4e27e133a07ff856f SHA-256: 8e8ee4c6e52cf62e45e07693b75c04dfb547ca326f06559d69d2cf8643beeb25
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external websites. One critical heuristic identified a link to a known malicious redirector, and another identified a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains a URL that appears to be related to 'binomische formeln aufgaben mit lösungen klasse 10', suggesting a lure to disguise malicious intent. The primary attack pattern involves redirecting users to potentially harmful sites through these embedded links.

Heuristics 3

  • 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.
  • 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.link/wix?keyword=binomische+formeln+aufgaben+mit+l%25C3%25B6sungen+klasse+10
    • http://zafuxax.breakingrulespublishing.com/uploads/1/3/0/7/130775455/sirafesubuxa-budiwesezi-pebopoviz-levudilenojesi.pdf
    • http://files.advicetotheplayers.org/uploads/1/3/1/8/131871951/9060062.pdf
    • http://files.cpsplantscapes.com/uploads/1/3/0/7/130739693/pezaneji_xogan.pdf
    • https://static.usrfiles.com/ugd/69b86f_33745609ba7b4e89bb6dfceb60e99326.pdf
    • https://static.usrfiles.com/ugd/5ad03d_0d5c18bb77b149c29dfac90b1b1fc06c.pdf
    • https://static.usrfiles.com/ugd/1f5cef_5c3f772240d64bb496b9c1466c6b6069.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/84437858089.pdf
    • https://cdn.shopify.com/s/files/1/0437/7480/4126/files/wilizajosaxodezi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/41933458151.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/chief_examiner_s_report_on_english_language.pdf
    • https://cdn.shopify.com/s/files/1/0441/2728/9496/files/pojabukuzapekajuteku.pdf
    • https://cdn.shopify.com/s/files/1/0461/7912/3353/files/golf_fundraiser_flyer_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/22931710373.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_off00006156.bin
29da0c920d62395c1eb0f52ff162665804c290acc08462ec7a14f1ac2dbfafdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6156 5880 bytes
font_01_sfnt_off000074fb.bin
9c4b5e354489e2ec03f29c1ff88a740b7a1de78ba790bbf2192171af2311d191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FB 11884 bytes

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