Malicious PDF — malware analysis report

Static analysis result for SHA-256 62472b934dfeede7…

MALICIOUS

PDF

43.1 KB Created: 2020-08-24 23:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ddeba3e8c4fee83f19314a854910e4e SHA-1: ed60dbed6c33a4f5dd1cfb1a43cb7391cc6fa0bf SHA-256: 62472b934dfeede7bd2e1b992ad1919db050766c10f14aa89919bb27c2bba32a
162 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a 'business proposal' lure. The presence of numerous Shopify links, some of which are confirmed benign, alongside a malicious redirector, indicates a link farm designed to obscure the ultimate destination of user clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=business+proposal+format+free
    • http://sisurader.techsavvi.net/uploads/1/3/2/6/132680848/rotitigov.pdf
    • http://files.lafleur-naturelle.com/uploads/1/3/1/3/131398360/zudoj.pdf
    • http://midebumo.riverlandsredbarn.com/uploads/1/3/0/7/130776659/fe11546.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/wolekut.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/wewakuzogufiredegegemeba.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/83141782390.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/9862849966.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/21160823140.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/35522557300.pdf
    • https://cdn.shopify.com/s/files/1/0429/3001/2316/files/tabuxibifagobifomet.pdf
    • https://cdn.shopify.com/s/files/1/0440/9730/6776/files/rimijojugorus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mirogorozizodixomalejog.pdf
    • https://cdn.shopify.com/s/files/1/0462/7372/4576/files/59694466426.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/alchemy_emperor_of_the_divine_dao.pdf
    • https://cdn.shopify.com/s/files/1/0438/0547/4978/files/xumadujigiwiduzivugajamo.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_off00006c00.bin
09bf6ea9f9de15cac920efc432de2fb6871f4ae6d2a5033e7870eb3e2d313e73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C00 5096 bytes
font_01_sfnt_off00007d37.bin
2bb92167a0e1802e21c268dc37d5e89621417ffef33d2f6bae6a96d2916bd022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D37 10020 bytes

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