Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d67c6d1abc7169…

MALICIOUS

PDF

51.3 KB Created: 2020-08-02 19:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 769539aa9239f2d961135d39e881b15c SHA-1: d3986e88c0ec3c70bbeed2e81af2bdf4513abe4e SHA-256: 09d67c6d1abc71692676364d225a0fbe6559160f523d21a9856294cbfc6a27a8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body also contains the same URL, suggesting a phishing or scam attempt to trick users into visiting a malicious site. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=make+a+movie+twista+download
    • http://files.warehousedistillery.com/uploads/1/3/2/6/132683267/velosab-sidalode-loxowodizome.pdf
    • http://files.celestejohnsonlpc.com/uploads/1/3/1/4/131453588/667108.pdf
    • http://files.overdorffangusoperation.com/uploads/1/3/2/8/132816202/ranogikig-worunefevib.pdf
    • http://files.anabhra.com/uploads/1/3/1/0/131070713/1e1fe9e4d4e9cc1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/82412877570.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4664/files/73260915576.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3902/files/ffmpeg_60fps_instagram_codec.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/vomat.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/bevezibujidoxitijurisez.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/69413416236.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/80790929271.pdf
    • https://cdn.shopify.com/s/files/1/0434/5446/4165/files/39427406706.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/toloviminoxobafewutikuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9447/files/fuvufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4970/4854/files/bemavoseludosekujifufipij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.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_off00008b38.bin
8dcef29ed0a0cd84dd3436b82e8310969e29a1c086fdcc35a201d55610934b59
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B38 5096 bytes
font_01_sfnt_off00009ca0.bin
45106a235d2a032effe63298b6a556bbad1e9ebc8c3385ae10cfd325f9004a46
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA0 10400 bytes