Malicious PDF — malware analysis report

Static analysis result for SHA-256 1443df8558675f7f…

MALICIOUS

PDF

67.3 KB Created: 2020-07-26 09:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff3c6852523cc846774bfaad1c027152 SHA-1: 2f69f6a7247f270046b15b11c1480906d50a6a9b SHA-256: 1443df8558675f7f352473cd1a74a957235fbdcbc74f2f3e2cc7739984e522e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign links.

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.cc/pify?keyword=pokemon+insurgence+egglocke+guide
    • http://files.gmgtravel.com/uploads/1/3/2/7/132740515/2488103.pdf
    • http://files.craigleacapetown.com/uploads/1/3/1/8/131871569/4a8692675f1c.pdf
    • http://files.experienceearth.store/uploads/1/3/2/3/132303019/2209223.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/zorobenibanedadevorokobaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/fadoludad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/81679662773.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/93642192634.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/davunaxejapezuxipuwuwozom.pdf
    • https://cdn.shopify.com/s/files/1/0429/0458/4355/files/losujular.pdf
    • https://cdn.shopify.com/s/files/1/0435/7606/6211/files/59167251507.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3281/files/wudibarugorafoxisepusaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wuvinotagug.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/nevepojomupakuwarus.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/56950380589.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c910.bin
696814b1851f02c04a131d76623d76fbe1d80785d04896248cdc038ca123ee19
pdf-font-stream PDF embedded font (sfnt) at offset 0xC910 4916 bytes
font_01_sfnt_off0000d99f.bin
65974d3abf225f0af1932509ca504dc1b62b42ecde697dca6878313095ed6dd2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD99F 11448 bytes