Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea157513fefba9c…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 09:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 956b958ca8264091a5dd6339bc8e975e SHA-1: 967804b3435356c296b1d61eb18a8969e84935d5 SHA-256: 1ea157513fefba9c3ae3e808e8325f12d8f7b5859fb9d1e0d01538cdb403ed8d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to 'brain teaser picture puzzles'. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, likely for SEO manipulation or to distribute 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.com/pify?keyword=brain+teaser+picture+puzzles+with+answers
    • http://files.littledarlingscookieco.com/uploads/1/3/2/7/132740595/fafixe.pdf
    • http://files.tohallyuwithlove.com/uploads/1/3/2/6/132681855/6c95d3718.pdf
    • http://nojep.okuharafoods.com/uploads/1/3/1/3/131380429/kesudobunegeduzujeru.pdf
    • http://files.mrlukewayne.com/uploads/1/3/1/6/131636946/vovuxiselavid.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/diagenesis_of_limestone.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/76654149174.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/jeveli.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/73774540209.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5312/files/keseruxisemalebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/76275965614.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nefodegaxinavikiva.pdf
    • https://cdn.shopify.com/s/files/1/0430/4407/7722/files/85274430483.pdf
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/fidamunudukefofovixaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/18962675064.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_off00006508.bin
85dbf139a16cc9ac34aa8b745de27ae6cc8f66716a0b9dd74e2c87c8f6a25a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6508 5212 bytes
font_01_sfnt_off000076d4.bin
123198a25742f1f7fa146ee2def00aee42e7efaa278a7042282b89604746f583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D4 10368 bytes

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