Malicious PDF — malware analysis report

Static analysis result for SHA-256 712d5e8c7779790b…

MALICIOUS

PDF

43.8 KB Created: 2020-07-22 12:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5db91bd057744fe258ef8a103b7365a2 SHA-1: 80e681d4fe64559fb73ab03cd2a404df2839670d SHA-256: 712d5e8c7779790b03c658047451e2c343e0a0be6e1c9164c13d100047918fb0
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to manipulate search engine results and lure unsuspecting users. While no scripts were extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to malicious sites.

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.ru/wb?keyword=wind%20turbine%20power%20calculation%20pdf
    • http://files.meetthebrentstones.com/uploads/1/3/1/8/131856626/sipebajapas-xamamejer.pdf
    • http://files.bluecanyonceramics.com/uploads/1/3/0/7/130775543/6007362.pdf
    • http://files.tecumsehtrailsoffroad.com/uploads/1/3/1/4/131411542/sidazuvasonafo-jalajoxox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/75910819320.pdf
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/nimanoremadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68513135127.pdf
    • https://zifalen.files.wordpress.com/2020/07/70805643647.pdf
    • https://bulimogip179696400.files.wordpress.com/2020/07/29477352636.pdf
    • https://telabawogevo.files.wordpress.com/2020/06/kazovepuzajokivapad.pdf
    • https://wavogufelo.files.wordpress.com/2020/07/18357847439.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5799/files/40480344385.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/fapemamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/dezeketifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/3545278114.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/zikabafixowifobufipesotox.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/67357374299.pdf
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/lefam.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/43452408310.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0562/files/danopofij.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_off00006d28.bin
0b0ac63ae9e31d7cc1dd0a2ff63cdd2fb1bf866a1a4fea6e83bf3c5869b209d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D28 5100 bytes
font_01_sfnt_off00007e94.bin
d62e7cce6d714e597d4a5f57ef4fae643a25afc9a90003a357171f3418589ba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E94 10184 bytes

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