Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6071f2844871ac…

MALICIOUS

PDF

37.9 KB Created: 2020-08-18 14:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cc708cbca47e37f3057678d304d8d3c SHA-1: e8b3501cd81835f3b3e44e32df5973f7b398e993 SHA-256: 3c6071f2844871ac918a9e5b8c19c965665328aff10797e3bf39a347c0861fa2
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 a malicious URL, disguised as a worksheet answer key. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are hosted on Shopify. The primary malicious URL identified is https://ttraff.com/pify?keyword=the+earth%2527+s+layers+worksheet+answers, which is likely used to redirect users to further malicious content.

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.com/pify?keyword=the+earth%2527+s+layers+worksheet+answers
    • http://files.mrgrenier.com/uploads/1/3/1/0/131070689/nonazisipaze-gatot.pdf
    • http://files.insourceaccountinginc.com/uploads/1/3/2/7/132712334/fusopeputu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1040/7069/files/nakikilekatidofewezideno.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0409/files/17841302200.pdf
    • https://cdn.shopify.com/s/files/1/0434/8038/3653/files/nomenclatura_para_alcanos.pdf
    • https://cdn.shopify.com/s/files/1/0436/9347/3947/files/sixapunubeke.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/zimirilukisokosum.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/58626693954.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/lukimituwuxedokugito.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_off00005653.bin
1c0f8697bc6538330e5abb31213beb5437782df403425223ac12abf671e16dff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5653 5012 bytes
font_01_sfnt_off0000677b.bin
57aaa21e54a8cec961d2b4927534c0641045477baea30d9d33ed2711dbf850dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677B 10364 bytes

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