Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edd7f22ec2a2fd9…

MALICIOUS

PDF

44.7 KB Created: 2020-08-21 11:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5139eaa1c51031291303cea94829b479 SHA-1: 7ca588d96ad8b66232ea47030c1a9374877c6255 SHA-256: 3edd7f22ec2a2fd9820049909997ca6d4265cdefc5a5b59aa52fe864fae82a5b
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to a 'lab activity report mendelian genetics answer key'. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, likely for SEO manipulation or to host further malicious content. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=lab+activity+report+mendelian+genetics+answer+key
    • http://pomawezos.casadefamiliaguate.com/uploads/1/3/0/9/130969018/koxof.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1658/files/sample_formal_absence_excuse_letter.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7392/files/bakejuxisi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7397/8011/files/34150544574.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/countries_without_postal_codes.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5721/files/43607775984.pdf
    • https://cdn.shopify.com/s/files/1/0432/3544/2855/files/48171532968.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/vulabipuzovekuram.pdf
    • https://cdn.shopify.com/s/files/1/0461/3219/9592/files/jixavejokomasobazol.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/xowapeliwef.pdf
    • https://cdn.shopify.com/s/files/1/0436/9013/1609/files/al_youm_newspaper.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/bigor.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_off0000673d.bin
2a2ad9689498eaca4ea9243c2848b5c9cd1ca867736916a3eb401f241ae89b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673D 5792 bytes
font_01_sfnt_off00007af9.bin
997a5fbccd65e0a8a2e0337cf9a5bf344963efa9fd2eedca285f1b6079acea2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF9 13504 bytes

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