Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76d0c0159679157…

MALICIOUS

PDF

40.1 KB Created: 2020-08-18 14:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18b3582a64043c1587eb0f65200cf08d SHA-1: b5e78e47242e52e6490b1dc8562343a9bd4bd198 SHA-256: e76d0c01596791578b1fe2cd88ade59c8d15508c328bea76bb3fc31e57f5a6b2
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many hosted on Shopify, designed to appear as legitimate documents but ultimately leading to a malicious redirector. The primary lure is a 'cody crossword quiz answers' which redirects to a URL on ttraff.com, a known malicious domain. This indicates a social engineering attack aimed at driving traffic to malicious infrastructure.

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/pify?keyword=cody+crossword+quiz+answers
    • http://files.mountmmbc.com/uploads/1/3/1/0/131070230/80f32c5.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/fasevi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/cheniere_energy_partners_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/remuginapogafatuxufulitu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1742/files/mowokine.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/adobe_acrobat_pro_dc_freezes_when_opening.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2906/files/find_endpoint_from_midpoint_and_endpoint_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/fosazexatalaxogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutuxajaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/sixulavaxosakane.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/futilobodilewojowivu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6262/4417/files/84105790792.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_off00005f83.bin
c2c984a793a001cffea314b72d2f38f140f10b2bb8ee2997aead60338b133776
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 5176 bytes
font_01_sfnt_off00007150.bin
1693356a1f4bd2ca588777b0f5c8724c784588ed84bc171ef06d0d6f25a61ab1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7150 10096 bytes