Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37b08afdeb696c8…

MALICIOUS

PDF

40.7 KB Created: 2020-08-27 22:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 518a79aff4bc892f5ba3643f1f95f729 SHA-1: 5ff55f0626cd9ddbc383ca0600333632c2a47a92 SHA-256: a37b08afdeb696c89435afd1662cbc2c47e2fa9ff440783b744e0076ef6a9a9a
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'African american heritage hymnal pdf' and the wkhtmltopdf tool, suggesting a lure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content or phish for information.

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=african+american+heritage+hymnal+pdf
    • http://files.bradenriverpirateffa.com/uploads/1/3/2/6/132682030/fuvido_gazukud_xojumekibululus.pdf
    • http://tigim.johnhofstetter.com/uploads/1/3/1/3/131384635/vojusawipalar.pdf
    • http://joxumom.jenniferbetteridgephotography.com/uploads/1/3/0/7/130739845/tilibafipoxu_tomorigurenalon_defibolokus.pdf
    • http://gasopev.stillyriveryarns.com/uploads/1/3/0/7/130738884/bigul.pdf
    • http://files.avensys.co.kr/uploads/1/3/0/8/130813601/5891987.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1526/files/misapogepazikazugofomoba.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/jegadovibapuxivojedo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/mukakuvefurefoloregaraniv.pdf
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/contract_agreement_template_between_two_parties.pdf
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/nobod.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/66388379617.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/digegura.pdf
    • https://cdn.shopify.com/s/files/1/0430/1373/4563/files/bibliography_sample_for_school_project.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_off00006251.bin
b69a937fb5f3d66412a49dd35fc8d6ee514e75749bdf0f37eb52fc965ccb9aa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6251 5480 bytes
font_01_sfnt_off000074c8.bin
46feb5617e7e17d5be422423b2a50d2c0f309b0cc2b680d5e590426246c3135a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C8 9572 bytes

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